Henderson replica counterbalance spring for the Dolphin Range, this spring is for the "Grey" version and measures 21.5" over coils with a diameter of 1.5" and has 99 coils (wire diameter 5.75mm)

Suitable for the following Henderson Doors -Dolphin Double Retractable Doors 10"2 to 12"6 wide,Merlin & Dolphin Retractable Doors 7'0 to 8'0 wide,Regent Retractable Doors 7'0 to 7'6wide, Gloucester, Sovereign, Warwick and Lincoln Doors 7'0 x6'6 and 7'0 x 7'0 and Henderson Ultra 100 from 7'0 x6'6 to 8'0 x 7'0.