The carefully prepared package is carefully equipped with 2 aluminum gaskets with a diameter of 73mm (2.87inch) and 2 aluminum gaskets with a diameter of 79mm (3.11inch), plus 8 long valve discs. The dimensions of each component are accurate, as shown in figure. The air compressor gasket is carefully made of superior aluminum, which is excellent in resistance and sealing, which can the hidden danger of gas leakage from root, and build a solid foundation for stable and efficient operation of air compressor. compressor parts accurately adapt to air compressor 68740, 69667, 67501 and other models, a of compatibility reduces trouble caused by adaptation errors, installation can be used. The long valve disc of component has been deeply polished by a special process to achieve a perfect balance between flexibility and strength, and can always maintain a stable shape and greatly extend its service life even under harsh conditions of high frequency opening and closing. At beginning of design of entire kit, the installation convenience is put in first place, and specifications of each component are accurately controlled, without complicated debugging process, even ordinary maintenance personnel with little experience can easily control installation work, greatly saving maintenance time and cost. :A better seal can be formed between aluminum valve disc and seat to reduce gas leakage and the quality and pressure of compressed air. Please note: When installing a replacement, it is absolutely necessary to install/position lower valve with a small amount of grease. Failure to do so can lead to premature valve rupture. Product name: Air compressor gasket Product weight:30g Product size: Small diameter aluminum pad: 73mm/2.87in Large diameter aluminum pad: 79mm/3.11inch Color:Silver Material:Aluminium Package Contents: 2 * 73mm aluminum gaskets 2 * 79mm aluminum gaskets 8 * long valve plates Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.