886555 Nailer O-Ring 1.55 x 1.55 x 0.10 inches for Porter Cable RN175 FN250A NSS150 Seamless Repairs, Peak Performance - Choose Our Parts Today Upgrade Your Outdoor Tools with Our Replacement Parts Effortless Repairs, Superior Performance - Trust Our Replacement Parts for Lawnmowers, Brushcutters, and Chainsaws We kindly ask you to double-check the part's appearance in the photo and cross-reference it with the provided dimensions to ensure a perfect fit