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| Stainless steel holder for colony counting or particle collection. For 50mm diameter membranes. For regular use of 47mm diameter membrane, order the frit 6980103. PTFE gasket. Tap in the base part to control vacuum in the holder. Flow rate 200ml/mn with a 0.2µm membrane and 600ml/mn with a 0.45µm one. 100ml and 500ml holders are with a lid with a silicone seal and a small central air port. |  |
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