The Sealey OFC1 is designed to be used in conjunction with a press, & this unit crushes filters up to 115mm in diameter & removes most of the oil & sludge, which drains into a suitable container (not included). This model is suitable for 38mm (1.5") in diameter press rams & optional rams enable use with 50mm & 60mm rams which come supplied. Completing the Sealey oil filter crushing unit, is a solid construction to ensure long term reliability.