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This Tap Valve replaces the standard 50mm filter of a 250mm or 300mm plankton net and allows for the sample to to be transfered to another sample bottle or counting chamber easily. It can be used in conjunction with the Clear Extension Tube
Please note: this adaptation will only fit plankton nets with a 50mm filter, if you have a plankton net with one of the smaller 32mm filters please contact us on 01803 865 913.