Examine the label at the end/s of your existing springs. FIRST LETTER/S: these determine the securing mechanism or type of spring. A lock end springs label will start with SL. FIRST NUMBER: this is the gauge of wire that the coil is crafted from. A 7 means 7-gauge wire.
SECOND NUMBERS: these determine the physical length of the spring. If your spring is missing its label.
Get a tape measure or ruler. Place sideways over the coil to get the diameter. Place it lengthwise and measure the length of ten coils, then divide this number by ten. This will give you the wires size/gauge.
Curved, locking pins secures spring at both ends. Rated for 9000 cycles of operation. When adding to cart, please select a spring size. SL728 - 28 IN Lock-End Spring.
SL730 - 30 IN Lock-End Spring. SL732 - 32 IN Lock-End Spring.
SLR729C - 29 IN Lock-End Spring. Designed for use with the E900-R Tension-Lift Hardware Kit for Single-Panel Garage Doors. Replacing hook/joining hardware to match tension of a new spring is strongly recommended.
Single-spring assemblies will use a C-Hook. Double-spring assemblies will use a W-Hook.