Auto Diagnostic Tools & 8 pcs Petrol engine compression tester kit (VK0119): Model: VK0119 1.For direct and indirect engines 2.Dual scale guage 3.Thread chasers m10 m12 m14 m18 4.Extensions m10 m12 m14 m18 includes five adaptors and two thread chasers covering four plug thread sizes 5.Diameter 57mm gauge fitted with heavy rubber bumper, 150mm hose and m14/m18 fitting. 6.Scale reads from 0-20bar(0-290psi). 7.Suitable for most petrol engined cars and light commercials. 9.Includes five adaptors and two thread chasers covering four plug thread sizes. 9.Supplied in carry-case. Adaptor sizes: m10, m12, m14, m18 Thread chasers: m10 x m12, m14 x m18