Dị ka Springs Manufacturer na Supplier, anyị na-enye Roll Up Door Torsion Springs na 1.75" , 2" , 2 5/8 ", 3 3/4" , 5 1/4" na 6" n'ime dayameta na otutu waya nha sitere na 0.162 ″ . 0.295 ″, 0.393″, 0.406″ ruo 0.437″.All Springs na-mmanu ụlọ mmepụta ihe iji belata esemokwu na corrosion ka ọ na-abawanye ndụ okirikiri mmiri.Kwa ọnwa anyị na-ebupụ ihe fọrọ nke nta ka ọ bụrụ 8000 ụzọ abụọ Roll Up Garage Door Springs na USA, Canada, UK na Australia.