1. Tube is 60*120mm oval combine with 60mm round tube, make design high-class 2. Aluminum slide-way support the seat, make the adjustment smooth and comfortable 3. Pully dia.: 106mm as metal, keep machine smooth and durable, effectively in keeping lower noise 4. Isolated motiopn, which can do separated exercise for special training, to get the smooth and professional workout 5. Tube of the weight power, size 20cm. Combine with the wedge-shape design. Make machine solid and stable. 6. Seat adjustment is the air powered adjustment system