Features: 1.【Application】: Fits For DeWALT Models D55146 , D55167 & D55168 All types numbers.919-167600 , 919-167610 , 919-167620 , 91916730. AP1615-OF Type 0 CAP1645-OF Type .(Does not fit any 2 cylinder pumps) 2.【Replacement】: Part # N038785( 73MM ( 2-7/8") BORE ). Replaces Pt # A17572, N021229 , N021725. 3.【Material】: Made of high-quality steel and aluminum alloy, rubber ring.Durability and high precision and hardness. 4.【Simple Installation】: No need to cut, just remove the old one and replace it with a new one. .