Fitment: Fits most Chinese scooters, ATVs, and Karts with 125cc,150cc GY6 motors Also will for other brand PWK, CVK, PE type carburetor. OKO, KOSO, Stage-6, Polini ....etc Slow/Pilot Jet for Keihin PWK type CVK type PE etc. carburetor. Carburetor Main Jet kit for 150cc and 125cc GY6 carburetors. DO NOTE: Not for CV ,VE & CVK above 30 mm carburetor. Dimensions: Thread Size: M5x0.80 Overall Length: 8mm Thread: M6 x 0.75mm 28mm total length with a 5mm round head Package content: Comes in 20 pieces, including the following sizes packed in a small plastic case: 10 pcs Slow/Pilot Jet: #32, #35, #38, #40, #42, #45, #48, #50, #52, #55 10 pcs Carburetor Main Jet: #100, #105, #108, #110, #115, #120, #125, #130, #135, #140 1 piece for each size. Please check pictures for more details. NOTE: Please make sure the part numbers match the part you are replacing. Please check our photos and make sure the part shown looks identical to your stock one.