Please note that these filters are compatible ONLY with the following products from Across International VO-16020pm, VO-16020vm, VO-16020v2, VO-16050pm, VO-16050vm and VO-16050v2 vacuum oven systems TW1A, TW3A, 2TW4C and TW6A vacuum pumps Specifications OD: 3 1/4"
Two stages purification
Stage 1: oil filter eliminate vacuum pump oil mist/smoke and returns trapped oil back to the pump
Stage 2: charcoal elements trap organic chemicals and eliminates fumes
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