ITEM NAME:4Pcs Car Engine Cylinder Piston Grinding Valve Lapper Hand Tool Description: - Ideal for hand lapping small and large head unslotted valves. - Make sure valves seat perfectly during a top-end rebulid. - Easy-grip handles for better control. - Oil and UV-resistant synthetic rubber cups. Specification: - Material: Rubber - Size:(Approx).225x35mm/8.9x1.4 Inch Package Included: 4 Pieces Engine Valve Lapper Kit.4 Pieces Engine Valve Lapper Kit. - Make sure valves seat perfectly during a top-end rebulid. - Ideal for hand lapping small and large head unslotted valves. - Material: Rubber.