Prime-Line B 746 1 In. Stainless Steel, M Style Tension Spring Roller (2 Pack)

Used by Arcadia and a variety of other sliding patio screen manufacturers, 2-3/4 inch M-shaped tension spring that does not require any adjustment, 2 inch diameter stainless steel roller, Heat treated stainless steel M style tension spring, Please refer to the line art drawing and compare with your needs item before purchasing (Not Universal)