Replace worn out drain plug gaskets to stop annoying leaks Covers most domestic and import cars and light duty trucks OEM recommends replacing with every oil change Includes: (5) ½/12mm Rubber/Metal (5) 9/16 Rubber/Metal (10) ½/12mm Nylon (5) ½/12mm Nylon (Large) (10) 9/16/14mm Nylon (5) 5/8 Nylon (5) 11/16 Nylon (5) 3/4/18mm Nylon (5) 7/8/22mm Nylon (5) ½ Fiber (5) 9/16 Fiber (5) 12mm Fiber (5) 18mm Fiber (5) 20mm Fiber (5) 1/2/12mm Copper (5) 9/16 Copper (5) 5/8/16mm Copper (5) 3/4 Copper (5) ½ Copper Crush (5) 14.5mm Aluminum (5) 12mm Rubber Rib (5) 14mm Rubber Rib .