Stomacher® bags are all manufactured from virgin polymer granule extruded into a tube. The only seal is at the base. All bags are batch tested and in-process monitored during manufacturing on Stomacher® machines. Bags are tested against a wide range of parameters that include open-ability, transparency, and flexibility as well as dimensions and performance. Stomacher® bags come in a range of formats to suit all applications.

Manufactured from high-grade, food quality polythene
Minimum 65 µm film thickness provides high impact strength
Gamma irradiated at 25 to 50 kGy to guarantee sterility. Individual irradiation batch certificates are available on request
Bags are batch traceable to 10 packs and pharmaceutical QC standard sampling protocols are applied in manufacturing
Stomacher® bags are packed in durable white plastic sachets, with printing to show the contents and which end should be opened to maintain the sterility of the contents on the laboratory bench

Standard bags:
Standard bags are available in two sizes: 400 and 3500 ml. The 400 ml bags are produced in Circulator format with round bottom seals and Classic format with square bottom seals. The 400 ml bags are available in two different packaging formats, plastic carry packs or cardboard boxes, the latter are packed in either sachets of 5 or 50 bags.

Strainer bags:
Strainer bags are standard bags with a strainer bag suspended inside. The strainer is a full width bag and has a pore size microbiologically guaranteed to allow the free movement of organisms through it and to eliminate the risk of pore blockage, which will occur in finer mesh filters. The strainer bags reduce pipette blockage and also protect the bag film from gritty samples. Available in 400 ml Classic and Circulator formats.

Closure bags:
Closure bags have a simple wire closure attached to the open end of the bag. These bags can be used for sample collection. In food testing the closure bag can be used to pre-enrich samples for pathogen testing by sealing the bag and placing it in the incubator after Stomaching. Available in 400 ml Classic and Circulator formats.

Simplettes are inexpensive pipette tips for use with Stomacher® 400 bags. They are the right length to reach down to the bottom of the bag to recover the sample for inoculating Petri dishes and broths.
Manufactured from polythene.
Gamma irradiated sterile.

Racks and openers for Stomacher® bags:
Stomacher® bags racks and bag openers assist the operator in handling their samples on the bench.
Strong clear plastic racks - easy to maintain and clean.
Bag openers to assist the operator in loading samples and pipetting homogenate.


Our simplest and most widely used bag, suitable for blended homogenisation of diluent samples for most applications. Stomacher® classic blender bags are designed to be used with the square paddle Stomachers® machines.

  • Sample size: 80ml – 400ml
  • Suitable for all makes of paddle blenders
  • Irradiated sterile
  • Bag size:  177mm x 305mm


Dimensions        17.7 × 30.5 cm

Sample Size        80ml – 400ml

Autoclavable      No

Closure No

Bag Thickness    65µm

Strainer No

Pack size              250 (sachets of 5)             500 (sachets of 50)

 Technical specifications

Firstly thank you for visiting Gentrex International Medical Supplies Pty Ltd.

For complete shipping terms please click here for our Terms and Conditions

The below shipping terms are excluded for orders that contain bulk or freight items, or address’s that are outside metropolitan areas as defined by our courier companies.

Orders over the values of $250.00+gst will be shipped freight free.
For non cold chain orders under $250.00+gst, a $10.00+gst freight charge will be applied.
For cold chain (vaccines) orders under $500.00+gst, a $20.00+gst freight charge will be applied.
If you require freight pricing on bulk or freight items, please contact our customer service on +61889635743

For complete shipping terms please click here for our Terms and Conditions
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