Product Description

• Allows the compression of petrol engines to be tested whilst running.
• 2-1/2" Large easy-to-read scale measuring 0-300psi/0-20bar with 9" of flexible hose and push on adaptor incorporating a Schrader one way valve.
• Side pressure relief valve allows rapid retesting. Display packed in blow mould storage case.

Technical Details 
Contents: 
• Gauge with flexible hose 
• adaptors size: M10x1mm , M12x1.25mm,  M14x1.25mm  and M18x1.5mm 
• 2 double-ended spark plug thread chasers size: M10/M12 and M14/18