Charming Model Tyre Repair Machine (STS23) Features: 1. The complete bead breaker cylinder made of steel iron, more durable. 2. The complete clamping cylinder with 80 diameter, the seal ring and the piston are integrated, less resistance. 3. The complete gearbox made of aluminium, light and more durable. 4. Semi-automatic side swing arm 5. Pneumatic bead breaker 6. OPtional/A/ Rear air tank serves as tubeless tire inflating device.