* Black seat back frame headrest PA+25% glass fiber, lumbar up-down adjustment
* Huayu mesh fabric, black PP+25% glass fiber fixed handrail
* 14mm thick E1 grade environment-friendly ecological seat board
* 75 density stereotypical sponge, with rubber housing and original locking chassis
* Yuechang (Xieqiang) Grade IV black air pressure rod passed SGS certification
* 340 # PA nylon black five-star pin, Φ 60 black PU wheel passed SGS certification