office chair part,chair part,furniture part,gas spring,gas lift,gas cylinder,gas strut office chair part,chair part,furniture part,gas spring,gas lift,gas cylinder,gas strut 1. Stroke option (mm): 65/85 / 100 / 120 / 140 / 160 / 180 / 200 / 260mm,etc.2. Function:Height adjustment,up and down freely,no noise,swivel freely3. Surface finishment: powder coating/chromed4. Bottom Type: Folded type or ...