SIENOC 10PK 3D Printer GT2 Timing Belt Locking Torsion Spring for 2GT 6mm Width Belt (10PK Spring for 3D Printer) Package Included: 10x Torsion Spring Product Features Type: Torsion Spring Steel wire diameter:1mm Inner Spring Diameter:4mm Used for 6mm width GT2 timing Belts Package Included: 10x Torsion Spring












