Application: Fits for ZWD & ZWDK series 15mm pumps. For ZWD2530G, ZWD3030G, ZWD4030G, ZWD4040G, ZWDK3030, ZWDK4036 AND ZWDK4040 pumps. Please check description below to see more compatible models. Direct Replacement: Alternative to Pressure Washer Seal Kit 5019006400. Superior Quality: Manufactured from high standard rubber and plastic for strength and durability, the quality will meet or exceed your OEM seal repair kit. Function: Replace old broken one with this kit to better service the entire pressure washer pump, making your machine work more efficiently. .