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| Stainless steel holder for colony counting or particle collection. For 50mm Ø membranes. For regular use of 47mm Ø 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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