seated back extension equipments 

1. adopting the advanced designing concepts from united states. 
2. the main tube: 137×40×3mm flat oval cold-drawn steel tube, novel and unique. 
3. backrests and seats are made from high-density foam, the surface is pvc leather fabric material with 1mm thickness. 
4. adopting 4.5mm diameter imported high-strength flexible wire rope and high-quality nylon pulleys which is durable and makes the movement smoothly. 
5. using precision cold-rolled counterweight iron, equipment balance weights from 150lb to 300lb
6. using us-made class 8.8 fasteners galvanized screws, which is durable, never rusty
7. adjustable multiple angles design, fit for users with different height
8. luxury framework with elegance appearance, fully enclosed pc cover is safe to use
9. various auxiliary design with more exercise modes, suitable for people with different body shape, makes exercising affects much better
10. the surface adopts bright silver coating, making beautiful appearance
11. the main pipe thickness is up to 3mm and the connecting parts thickness is up to 10mm
12. with belt drive design
13. parts movement orbits follow the kinematics trajectory
14. the weight stack is adjusted by magnetic latches
15. the seat adjustment adopts leverage, which is patented technology
16. high-speed bearings are used on the machine, no noise during exercise, which is as advanced as world first class brands
17. the counterweight and belt alignment adopts safety devices