自載重機構. 適用中、大型椅. 

符合人體工學傾仰功能，4 段式鎖定.

  椅背安全回彈裝置,氣壓升降.

傾仰最大角度 20 度.

鎖孔中心孔距：150 × 200 mm

 Self-weight mechanism.

   For medium and large office chairs. Ergonomic design.

   Tilting function, 4-stage locking.

   Tilting ride : Max. 20°.

   Backrest return-preventing system.

   Gas height adjustment.

   Hole space : 150 × 200 mm (W×L)