Replaces 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 Contents: (5) 1/2"/12mm Rubber/Metal (5) 9/16" Rubber/Metal (5) 1/2"/12mm Nylon (5) 12mm Nylon (5) 1/2"/12mm Nylon (Large) (5) 9/16" Nylon (5) 14mm Nylon (5) 5/8" Nylon (5) 11/16" Nylon (5) 3/4"/18mm Nylon (5) 7/8"/22mm Nylon (5) 1/2" 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) 1/2" Copper Crush (5) 14.5mm Aluminum (5) 12mm Rubber Rib (5) 14mm Rubber Rib