Product Description This compression tester can be quickly tuned to your bike / car, then you can get accurate readings on the valve, piston ring, cylinder bore or head gasket. Pressure gauge and rubber guard on double scale (0 to 300 psi, 0 to 21 kg / cm 2) to prevent scratches. Nickel-plated copper drain valve, anti-oxidation, corrosion resistant. M10 adapter for motorcycles, M12 M14 M18 adapter for motor vehicles. Specifications: Pressure gauges with rubber protection Manometer diameter: 75mm Test pressure: up to 21 bar / 300 psi 4 adapters: M10x1.0mm M12x1.25mm M14x1.25mm M18X1.5mm Pipe length: 430mm / 16.93 in Pressure tube length: 150mm / 5.91 in Elbow Pressure Tube Length: 160mm / 6.3 in Pressure gauge size: 125X74X35mm / 4.92X2.91X1.38 in Note: Please allow 1-3cm differs due to manual measurement.