Pair of 2 Garage Door Torsion Springs with Non-Slip Winding Bars

SPECIFICATION: The spring size is 0.207″X2″x23″, it is suitable for 7′ or 8′ high door with standard lift. special design for longer life (more than 10,000 cycles.) HOW TO CHOOSE: Before placing order, please confirm original spring size first, then choose the same size or bigger spring. PS: for safety, choose smaller spring is absolutely prohibited. – 1, 1xleft-hand wind spring – 2, 1Xright-hand wind spring – 3, 2 pcs winding bars – 4, Spring size: 0.225″x2″x27″ – WARNING: HIGH SPRING TENSION CAN CAUSE SERIOUS INJURY OR DEATH.Professional installation is recommended. Do NOT attempt to install springs or hardware by yourself unless you have the proper tools, reasonable mechanical aptitude and experience, and upper arm strength. Extension and torsion springs, along with attached hardware, are under extreme tension at all times. All tension must be released from springs before any work is performed.