Rolling Steel Door 4″ spring Castings for 4″ pipe accept 2 7/8 and 3″inside diameter torsion springs
4″ Pipe Torsion Spring Inserts (per set)
$67.00
Accepts 2 7/8″ ID and 3″ ID round .wire torsion spring 1 1/4″ bore accepts 1 1/4″ shaft. Fits 4″ pipe (sold by set)
