Sealey Compressed Air Adaptor Use with VS160. This adapter is designed to work with Sealey VS160 or VS168 valve spring compressors to hold valves closed while the spring is compressed. It features a spark plug adaptor with M14 and M18 threaded fittings, suitable for car and light commercial use. The valve assembly helps maintain cylinder pressure when the air supply is cut. It requires a 90-125psi air supply and a standard bayonet air line coupling (not included). Model: VS1601. Brand: Sealey. Quantity: 1 Piece.