Pros Of Our Chevrolet P6000 Oil Drain Plug Crush Washer Gasket PREMIUM QUALITY: VotexSeal+ oil drain plug aluminum crush washers are crafted from soft-tempered aluminum for durability and precision. For an added level of protection, we feature a layer of PTFE on each sealing surface to ensure an oil-tight seal. SPECIALLY FORMULATED: To ensure a reliable, oil-tight seal, a crush washer requires a unique blend of aluminum. Our washers are made with materials produced especially for the role of a crush washer. Not all aluminum crush washers are created equal. PRODUCT DIMENSIONS: O.D. (outside diameter): 21mm - I.D. (inside diameter): 12.3mm - Thickness: 1.8mm 100% SATISFACTION: We stand behind our quality crush washers 100%. No matter what your question is, email or call our technical support staff located in Wisconsin with your questions or concerns. Unsatisfied with your crush washer? Simply return it for a full refund within 30 days. VALUE-DRIVEN PACK: The 20-pack of VOTEX M12 crush washers offers excellent value for multiple oil changes. Practical compared to individual OEM washers while maintaining sealing quality and performance. This pack offers effective seals without compromising on quality. Legal Disclaimer: Click Here