Ma ke ʻano he mea hana a me ka mea hoʻolako, hāʻawi mākou i ka Roll Up Door Torsion Springs ma 1.75 ", 2", 2 5/8", 3 3/4", 5 1/4 a me 6" i loko o nā anawaena i nā nui uea nui mai ka 0.162" , 0.177″, 0.182″, 0.192″, 0.207″, 0.218″, 0.225″, 0.234″, 0.243″, 0.250″.″ 3,20″ 0.295″ ,0.393″, 0.406″ i 0.437″ .ʻO nā Puna a pau ka lubricated hale hana e hōʻemi i ka friction a me ka corrosion i ka wā e hoʻonui ai i ke ola pōʻai puna.I kēlā me kēia mahina, hoʻokuʻu aku mākou i kahi kokoke i 8000 mau hui Roll Up Garage Door Springs i USA, Canada, UK a me Australia.