Product Information:Pressure cooker parts washer measures 19.2mm OD x 6.7mm ID x 1.43mm thick. Package contains four washers, with your purchase you will receive 4 brand new pressure cooker interlocking washers. Compatibility: Pressure cooker interlocking washers are compatible with specific models of Presto pressure cookers for Presto 85659 85407, compatible with Presto pressure cooker models 01/C13, 01/C17, 01/C22, 01/CG22, 01/PA4, 01/PA4H, 01/PA6, 01/PA6H, 01/PE3, 01/PE6, 01/PS4, 01/PS6, 0121001, 0121002, 0121004, 0122101, 0122102, 0122104, 0125001, 0125002, 0125004, 0125005, 0126101, 0126102, 0126104, 0126105, 0131001, 0131004, 0135001, 0135004, 0171001, 0171002, 0171003 Compatible Presto Pressure Cooker Models: 0174001, 0174510, 0175001, 0175002, 0175003, 0175004, 0175005, 0175006, 0175107, 0175510, 0177001, 0178001, 0178002, 0178003, 0178004, 0178005, 0178006, 0178107, 0178209, 0178410, 0211101, 0215101, 0215102 Product Function:The interlocking washer is a key component of the pressure cooker and is responsible for keeping the cooker sealed during the cooking process to ensure that the cooking pressure reaches a predetermined level. In terms of safety, the pressure cooker interlocking gasket ensures that the pressure cooker will not leak during the cooking process, thus avoiding potential safety hazards. High Quality: made of high quality materials with excellent heat and wear resistance, it can withstand high pressure and high temperature environments for a longer service life. Easy to install: installation is very easy and quick, when installing the interlocking gasket, please make sure to install it correctly according to the instruction manual of the pressure cooker to avoid damaging the gasket or affecting the sealing effect. After-sales Service: Your satisfaction is our pursuit! In the process of product use if you encounter any problems you can contact us by e-mail, online customer service, our professional team will provide you with effective solutions as soon as possible.