Draper Petrol Compression Tester Product Overview Product Details Compatible with direct and indirect petrol engines which use 14 and 18mm spark plug threads. The dual reading pressure gauge 0 – 300psi/0 – 20bar is fitted with a heavy duty rubber protector. Fitted with a spring – loaded pressure relief valve and integrated Schrader one – way valve system. Supplied in a plastic storage case. Contents: 1x 63mm Diameter gauge 1x 280mm Flexible hose 1x Adaptor
