多功能底盤，調節手柄可調節座椅前後傾仰和底盤升降，椅座靠背個別操作，無段傾仰調整，整張座椅可前後擺動，更增舒適感，搭配背板。

A tilter with spring tension control. Seat & back are independently adjustable and can be locked infinitely at desired tilting angels. Suitable for chairs of big size; but with different steel bar back stem.