1 x Piston Ring Compressor Height: 88mm, Capacity: 90 to 175mm. 1 x Piston Ring Compressor Height: 100mm, Capacity: 90 to 175mm. 1 x Piston Ring Compressor Height: 75mm, Capacity: 53 to 125mm. Piston Ring Pliers for the easy release of Piston Rings and a Piston Ring Cleaner supplied with three cutters covering most popular piston groove sizes.