F217 is a polyolefin foam extruded between two layers of polyethylene, usually 0.050" thick. F217 allows a closure to be torqued with 20 lbs of foot pressure and once the pressure is "backed off" the foam will come back to almost 100% of its original shape—giving a good, repeated seal.
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Founded in 1983 as a manufacturer's representative, Chrom Tech has grown to a worldwide distributor of chromatography instrumentation and supplies. We are dedicated to providing technical expertise in the chromatography field by recommending products to meet your analytical requirements.