HIPA Carburetor Rebuild Kit K20-WYL with Primer Bulb for WYL Series Carb Replace manufacturer part number: K20-WYL , Ryobi 753-04014 Fits WYL series Carburetors ( WYL-1-1 to WYL-318-1) Primer bulb O.D x I.D x H: 0.75(19mm) x 0.625(16mm) x 0. 55(14mm) Package includes gaskets, screen, seals, inlet lever, needle, diaphragm, pin and primer bulb ( the 16 kits in the picture) Checkvalve is not included. Watch the picture carefully, make sure the 16 kits can meet your needs