... ; 3.Chrome/powder 4.PICC insurance gas spring/gas lift/adjustable gas spring/chair gas lift gas spring,chair gas spring ... ,gas spring for furniture,adjustable gas spring1.TUV class 1~42.Trip:50~260mm;3 ... set of components, including: caster wheel, chair base, mechanical, plastic,seat cushion, armrest, back of a chair, and high class mesh ...