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25 mm glass holder for the filtration of small ... volumes 25 mm glass holder for hybridisation tests particle ... differ only in the filter support the glass frit or the ptfe-coated screen support ... the device with glass frit ensures uniform distribution of ... work the ptfe ring which holds the glass frit or the screen support allows for ... support it also protects the rim of the glass frit from breakage and from potential ... spout parts and materials 6980115 glas funnel 30 ml 12 mm d borosilicate glass ... funnel and base ptfe/glass filter support type 16306 and ptfe/ ... with teflon type 16315 25 +3 mm as for glass ptfe and silicone silicone o-ring ... ptee-ring 6980117 silicone o-ring 17148 glass frit and ptee-ring the silicone o-ring ... sterilization order numbers 16306 16315 glass device for 25 mm membrane filter with ...