Check the listing for details. Replacement Chief S21M Frame Machine lift Ram Seal Kit - Dual Acting. Condition: New. Listed at 99.05 USD. Replacement Chief S21M Frame Machine lift Ram Seal Kit, Compare to Chief part # 601090, works with dual acting hydraulics only. please make sure to properly identify the model of you machine before you make a purchase. Seal Kit for Chief Dual acting Lift Ram Part # 601193Compare seal kit to Chief Part # 601090 works on S21M only ! Dual acting low pressure Free Shipping Note: This seal kit works with dual acting hydraulic rams, If you are not sure of what you need please email or text pictures of you machine and ram before purchasing we will he happy to assist you in getting the correct part. This seal kit will not work with single acting cylinders. This is a Non-OEM, Aftermarket, Replacement part that replaces original part # 601090