Prime-Line B 713 Screen Door Tension Spring with 1-1/8 In. Nylon Roller (2 Pack)

Used by Andersen and a variety of other sliding patio door manufacturers, Unique loop shaped tension spring on top, 1-1/8 inch diameter nylon roller that is 1/4 inch wide, Diecast housing with high density polyethylene roller, Please refer to the line art drawing and compare with your needs item before purchasing (Not Universal)