Joaloka moetsi oa Garage Door Torsion Springs, re fana ka Torsion Springs ka bophara ba 1.75" le 2" ka boholo ba terata e ngata ho tloha 0.207, 0.218, 0.225, 0.234, 0.243, 0.250, 0.262 ho 0.272.Li-Torsion Springs tsohle tsa rona li entsoe ka terata ea selemo e matla haholo, e halefileng ka oli, e kopanang le ASTM A229.
Likarolo tse Tloaelehileng:
(1) 0.225 in
(2) Mohala oa Spring o halefileng le o halefileng ka Oli
(3) E etselitsoe 10,000 ho 15,000 Cycles