stainless steel constant force spring 1.good performance 2.high quality 3.compet stainless steel constant force spring1.We are specialized in producing and supplying ... Thickness: 0.04-1.0mm Width: 2.5-80mm Material: stainless steel strip metal,aluminium5.If you are interested in our products ... Pengjia Xiang,Laodaohe Town,Kaifu District, Changsha City,Hunan,China stainless steel constant force spring