Hex Head Bolt: 3/8" X 1 1/2"

Hex Flange Nut 3/8" Serrated

Cable Pulley 3" Heavy Duty

Extension Spring 9' Door. 39X54" 170 lbs. Clipped - The EA price is for only one spring.

Extension Spring 7' Door. 25X42" 120 lbs. Double-loop - The EA price is for only one spring.

2" Vertical Track, Custom by the inch

Door Hardware Engineering Fee

8 1/2" Cable Drum, 11' Vertical Lift for 1" Shaft

OPS-112-225-16-00-OL-OL - One-Piece Extension Spring: 1 1/8" ID, 0.225" wire, 16" long, Top End: Open Loop, Bottom End: Open Loop (each)

Extension Spring Safety Cable for 7' Clopay Ext. Spring Doors

Clopay EZ-Set Extension Spring Kit for 7' High Doors, Right Side

Clopay EZ-Set Extension Spring Kit for 7' High Doors, Left Side

Clopay EZ-Set Extension Spring Kit for 7' High Doors, L&R Sides

Hex Head Bolt: 3/8" X 1"

Extension Spring Tandem Hookup Kit for two doors ** Limited Supply **

Extension Spring Cable Adjustment Clip

Extension Spring Hardware Kit for 7' Doors up to 300 Lbs.

Cable Pulley 3" Standard

Cable Pulley 3" Fork w/ Safety Cable Guide

Extension Spring Safety Cable for 8' Extension Spring Door

Cables Assembled 3/32" for 7' High Extension Spring Doors. With Open Loops & Bare Ends

Cable Assembled 1/8" Custom with Open Loop & Bare Ends for Extension Spring Doors

Cables Assembled 1/8" for 7' High Extension Spring Doors. With Open Loops & Bare Ends