Usage Tips:This Jet kit includes 1 "Trick" GX140 emulsion tube and 2 (.036 inch & .037 inch ). The tube/ fit the GX140, GX160 (5.5hp), GX200 (6.5hp) and all similar style Clone engines (5.5hp and 6.5hp). Similar Clone engines include Ducar, 212cc, , and Launtop. If your engine runs poorly, or on half after upgrading your Air Filter and Exhaust, this Kit will likely solve your problem. This E-tube has a slightly larger main bore and less air bleed holes providing a better fuel signal. This E-tube improves performance through the rpm range. Throttle response is improved better from bottom end and mid-range. Try the smaller jet first Name: Carburetor Jet Kit Size: Emulsion Tube: 2.8 x 0.6cm/ 1.1 x 0.24in; 0.8 x 0.7cm/ 0.31 x 0.28 in Material: copper colour: gold Package Contents: 1 x Carburetor Kit Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.