ITEM NAME:Pack of 50 Car Engine Oil Drain Plug Crush Washers O Rings 12mm ID. 20mm OD. Car 50pcs Engine Oil Crush Washers Drain Plug O Rings Gaskets Seal 12mm ID. 20mm OD. SPECIFICATIONS.(Car 50pcs Engine Oil Crush Washers Drain Plug O Rings Gaskets Seal 12mm ID. Item included: 50 x Oil Crush Washers. 4) This oil drain plug crush gasket washers is for most of car. 2) Aluminum alloy automatic transmission fluid drain plug crush washer seal.