Garage Door Hinge No.2 - 18 gauge SHOP BY SPRING SIZE_218-1-3/4-26 and the teeth are 1

and the teeth are 1 1/4" wide (all sizes are approximate)

Guardian Pro Series Model 615

Liftmaster also "private labeled" openers for regional suppliers and dealers - usually it is very easy to see that it is a Liftmaster opener with a different name on the cover

Garage door universal operator(opener) reinforcement bracket

25' inch length

Garage Door Hinge No.2 - 18 gauge SHOP BY SPRING SIZE_218-1-3/4-26 and the teeth are 1Garage door replacement hinge number one, used on overhead sectional doors. This hinge is installed down the center of the garage door to connect all panels together, also on the outer edge of the bottom panel and the second panel. Galvanized # 18 Gauge steel 1 hinge per package For most overhead garage doors