Garage Door Torsion spring

Made of heat-treated professional spring steel coils with aluminum cones to make sure they are extremely heavy duty.

Product Detail

• HIGH QUALITY :

• Made of heat-treated professional spring steel coils with aluminum cones to make sure they are extremely heavy duty.

• The latest electrophoretic coating technology provide excellent corrosion proof performance and superior abrasion proof performance.

• Salt spray tests up to 300 Hours, and Minimum 16,000 Cycles.

• NEVER need to lubricate the spring, keep hands clean during installation

Product name	Garage Door Torsion spring
Material	ASTM A229 (82B)
Wire size	0.207/0.218/0.225/0.250/0.262/0.273/0.283/0.295
Inner Diameter	1 3/4'', 2'', 2 5/8'', 3 3/4''，5 1/4”, 6”
Finished	Oil Tempered /Galvanized /Black coated
Package	Wooden Case /Crate Boxes
Certificate	ISO9001：2008
Capicity	1000 Ton /Per month
Life Cycles	1000-17000 Times
Usage	Residential Sectional Garage Doors/Commercial Sectional Overhead Doors