Lyuduo-引張りばね Wire Diameter 2.0mm Outer Diameter 20mm Tension Spring Coil Extension Spring S Hook Draught Spring Pullback Spring, 耐圧縮性と耐久性(200mm (1Pcs))
Lyuduo-引張りばね Steel Extension Springs With Loop Terminates Tension Expanding Double Spring Od Loop 8-30mm Length 300mm Wire Diameter, 1pcs, 耐圧縮性と耐久性(20mm,1.6mm)