09905 sealing gasket replaces Presto pressure canner sealing ring parts # 85141. Fits Presto Pressure Canner models: Presto 01/CAA12H, 01CAA20H, 02/CAA12H, 02/CAA16H, 02/CAA20H, 01/C13, 01/C17, 01/C22, 01/CG22, 0171001, 0171002, 0171003, 0174001, 0175001, 0175002, 0175003, 0175004, 0177001, 0178001, 0178002, 0178003, 0178004, 0175005, 0178005, 0175006, 0178006, AND ALL MODELS BEGINNING WITH 01710, 01740, 01750, 01770, 01780 The sealing ring fits around the inside rim of the cover and forms a pressure-tight seal between the cover and the body of the pressure canner during canning and cooking First,Remove the old sealing ring and overpressure plug and clean the seal ring groove and overpressure plug hole.Then install the cleaned seal ring，make sure to install it under the stopper and lock pin, at the inner edge of the cover.And then Install the overpressure plug, push the side of the plug (marked "TOP"), enter the opening from the bottom of the cover.Finally open and close the lid several times to ensure the ring is fully in place.Easy to install without any tools 09905 sealing gasket replaces Presto pressure canner sealing ring parts # 85141.