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Product 01 / Core mesh

Oyster mesh
bags.

An oyster mesh bag is defined by more than its opening size. Form, dimensions and closure should suit the farm system in which it will be used.

Product overview

Start with the way the bag works.

Oyster mesh bags hold stock during cultivation while allowing water to move through the mesh. A useful specification identifies the mesh pattern and opening, finished dimensions, and the intended closure or attachment method.

Oysters held inside a black mesh bag — Oysters inside a mesh bag during cultivation.

Close view of black oyster mesh and bag construction — Mesh construction and bag surface, shown at close range.

Selection principle. A named mesh size is not a complete bag specification; ask how the opening is measured and how the finished bag is assembled.

What to specify

When comparing mesh bags, provide a reference photo or drawing if you have one. State the measurement method as well as the nominal opening, since published sizes may use different conventions.

Use the inquiry guide

PRODUCT DATA / 01 — CORE BAG

Product data
& specification

A complete oyster-bag specification identifies the mesh and the finished bag together. Use the schedule below to describe a new requirement or match a bag already in service.

Close view of black oyster mesh material — Mesh material detail; opening size must be verified by measurement.

Diagram comparing square and diamond mesh opening measurement conventions — *Illustrative only. State the chosen clear-opening or centre-spacing method and its tolerance in the purchase specification.

Parameter	What to define	Unit / evidence
Mesh material	Polymer/resin grade, virgin or recycled content, and any additives	Supplier data sheet / agreed material declaration
Mesh opening	Nominal opening and measurement method (clear opening, centre-to-centre, or other)	mm; define method and tolerance
Mesh pattern	Square or diamond; orientation if relevant to the installation	Drawing or reference sample
Finished bag dimensions	Lay-flat width and finished length; state whether measured before or after closure	mm or cm; tolerance to be agreed
Bag construction	Tubular mesh or fabricated panel; seams and joining method	Section sketch / sample
End treatment	Both ends open, one end closed, or another specified arrangement	Describe each end separately
Colour & UV requirement	Requested colour and any documented UV-stabilization requirement	Evidence/documentation to be confirmed
Weight & tolerance	Finished-piece mass for the selected mesh and dimensions	g per bag; establish after sample approval
Packing	Bundle/carton/pallet format and units per pack	Confirm for order and destination

Specification statusMesh aperture and finished dimensions are defined for each configuration. Record the value, measurement method and tolerance on a drawing approved before production.

REFERENCE CONFIGURATIONS / COMPARISON ONLY

Published mesh-bag examples

These values are transcribed from an external published schedule for buyer comparison. They are not verified ZY-OysterBags SKUs or a supply commitment. Confirm current availability, measurement conventions and construction on an approved drawing or sample.

Source summary

The page describes HDPE, square or diamond mesh, reinforced mesh, hot-pressed edges, black or white color, and roll or bundle packing. It also claims UV stabilization and chemical resistance but provides no resin grade or test standard, so those claims are not treated as verified performance. The page gives no mesh-opening measurement method, weight tolerance or dimensional tolerance. Its summary list omits the 2 mm and 18 mm options found in the itemized table, and its general sealed-edge statement conflicts with one unmarked sealed entry.

Mesh opening	Published bag dimensions	Published weight	Reinforced	Sealed edge
2 mm	100 × 40 cm	360 g	Yes	Yes
2 mm	100 × 40 cm	410 g	Yes	Yes
4 mm	100 × 50 cm	550 g	Not marked	Yes
4 mm	100 × 50 cm	550 g	Yes	Yes
4 mm	100 × 50 cm	700 g	Not marked	Yes
4 mm	100 × 50 cm	700 g	Yes	Yes
6 mm	100 × 50 cm	550 g	Not marked	Yes
6 mm	100 × 50 cm	700 g	Not marked	Yes
6 mm	100 × 50 cm	700 g	Yes	Yes
9 mm	100 × 50 cm	550 g	Not marked	Yes
9 mm	100 × 50 cm	550 g	Yes	Yes
9 mm	100 × 50 cm	700 g	Not marked	Yes
9 mm	100 × 50 cm	700 g	Yes	Yes
13 mm	100 × 50 cm	550 g	Not marked	Yes
13 mm	100 × 50 cm	550 g	Yes	Yes
13 mm	100 × 50 cm	700 g	Not marked	Yes
13 mm	100 × 50 cm	700 g	Yes	Yes
18 mm	100 × 50 cm	550 g	Yes	Yes
18 mm	100 × 50 cm	700 g	Yes	Not marked
23 mm	100 × 50 cm	700 g	Not marked	Yes

Buyer checkMesh size is not a complete specification. The reference gives no aperture-measurement method or tolerances; bag dimension order is not defined. “Not marked” reflects an empty cell in the source table, not a verified “No.”

BUYER’S GUIDE

How buyers should define mesh opening

“Mesh size” can refer to the clear gap, a nominal opening, or a measurement taken between strand centres. These values are not directly interchangeable. Put the measurement method and tolerance on the drawing, and confirm whether the stated bag width is lay-flat or circumference.

RFQ CHECKLIST

Containment target

Smallest stock size to retain, plus expected size range during use.

Mesh geometry

Square or diamond pattern; identify the opening measurement convention.

Finished form

Lay-flat width, length, seams and opening/closure details.

Operating cycle

Culture method, handling frequency and any replacement-bag reference.

COMMON QUESTIONS

Is a mesh number enough to order?

No. State the measured opening, measurement method, pattern and tolerance, then define the finished bag.

Can a mesh roll specification be used for a finished bag?

Only if the roll width, joining method, seam allowance and finished dimensions are also agreed.

Is there one universal mesh-size convention?

No single label is enough. Define whether the stated value is the clear opening, centre spacing, or another agreed measurement, then verify it on a sample.

Continue exploring

Compare the
whole range.

Review related bag forms before settling on mesh and dimensions.

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