Office Chair Base Item no: OM-1 Place of Origin: Danyang, China MOQ: 1000pcs Supply Ability: 30,000pcs/month Band Clamp, Nut Driver, Spring Collar For Sale Factory Port: Shanghai, Ningbo etc Material: Aluminum alloy; Size: 33cm/35cm in half diameter, 38mm/50mm hole, four or five legs; Customized designs are welcomed; Find information here of Office Chair Base, Spring Collar, OEM Aluminum Poles, V Shape Spring Clip, Nut Driver, Band Clamp, Chair Backrest, Storage Box, Adjustable Plastic Hose Clamp etc. Our company is a leader in the industry and we will not disappoint you.