All torsion springs are rated for 10,000 cycles. High cycle springs have computed cycle life and weights listed for use on both 7' and 8' high doors. Springs are dipped,coating the interior as well as the exterior of spring. Springs are color coded to DASMA standard colors.

  1-3/4" for 7' High Doors
   
    1-3/4" I.D.
70-140 lbs 		  1-3/4" I.D.
145-230 lbs
 
7' High Cycle / 8' (10,000) cycle   2" for 7' High Doors
     
1-3/4" High Cycle
55-125 lbs		  

1-3/4" High Cycle
130-200 lbs

   2" I.D.
70-120 lbs
   2" I.D.
130-180 lbs