Features :âœ… Exact replacement: 57-21-1 Carburetor Leak Detector for Walbro 705-020âœ… Upgraded Vision: Ferilter Carburetor Pressure Gauge is both quality and measurement are upgraded. Measurement range: 0200kpa(029psi). Wider range and more accurate measurement.âœ… Excellent carburetor leak detector: Fit for Walbro 57-21 705-020, used to test whether Walbro and other 2 cycle carburetors for leaks, replaces ZAMA PG-2, Tillotson 243-504.âœ… Great Value Set: Comes with extra 4 sizes of fuel line hose. I.D. 1/8" O.D. 3/16"(3mmx5mm), I.D. 0.15" O.D. 0.27" (4mmx7mm), I.D. 0.23" O.D. 0.47" (6mmx12mm), I.D. 3/32" O.D. 3/16" (2.5mmx5mm), each 2 feet. Can be applied to various models.âœ… What You Get: 1 Set Carburetor Leak Detector,3 PCS 15cm Fuel Line Hose, 4 PCS 2-Feet Fuel Line ,1 PC Clean Brush. Our friendly and prompt customer service. Worthwhile to choose!