Superior Material: These tools are precision milled from high-quality solid materials with a black coating. Designed to withstand heavy pressure and demanding use. CNC precision manufacturing ensures durability, impact resistance, corrosion resistance, and wear resistance for long-term reliable performance. Fitment: Designed to fit air oil-free compressor pumps and most current style coated cylinder sleeves. Compatible with models: AC-0102, AC-0051, D-20954, Z-D24959, Z-D24960, MO-3024, Z-D26718, Z-D26717, 919.152811, 919.727270, 919.152932, 919.165230, 919.167330, 919.165600, 919.166600, 919.167320, 919.152811, 919.152813, 919.152921, 919.152931, 919.155730, 919.166330, 919-165310, 919-165330. Material: ABS Color: As shown Package Contents: 1 x Connecting rod 1 x Piston ring 1 x Cylinder sleeve 2 x O-ring Note: Light reflection and different display settings may cause slight color variations between the product image and actual item. Measurement may vary by +/- 1-3 cm.