Exact replacement: 57-21-1 Carburetor Leak Detector for 705-020 Upgraded Vision: Carburetor Pressure Gauge features improved quality and measurement accuracy. Measurement range: 0-200 kPa (0-29 psi). Offers wider range and more precise readings. Excellent carburetor leak detector: Compatible with 57-21 and 705-020, used to test for leaks in 2-cycle carburetors. Replaces PG-2 and Tillotson 243-504. Interchange Part Numbers: 57-21, 57-21-1, 705-020 Fitment: - Tillotson 243-504 - ZPG-2 - 705-020 Please note: Minor color variations may occur due to lighting and display differences. This does not affect functionality. Color: As shown Material: Metal Package Contents: 1 set x Gauge Carburetor Leak Detector Note: Light reflection and different displays may cause slight color differences between the image and the actual item. Measurement error allowance is +/- 1-3 cm. Only the above package content is included; other products are not included.