Exact replacement: 57-21-1 Carburetor Leak Detector for 705-020 Upgraded Vision: Carburetor Pressure Gauge is both quality and measurement are upgraded. Measurement range: 0-200kpa(0-29psi). range and more accurate measurement. Excellent carburetor leak detector: Fit for 57-21 705-020, used to test whether and other 2 cycle carburetors for leaks, replaces PG-2, for Tillotson 243-504. Interchange Part Number:57-21/ 57-21-1/ 705-020 Fitment: for Tillotson 243-504 for ZPG-2 for 705-020 Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:As Shown Material:Metal Package Contents: 1 set * Gauge Carburetor Leak Detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.