50pcs 0.5*5mm series small spot spring 0.5mm wire compression pressure springs 0.5*5*(10/15/20/25/30/35/40/45/50) 3D printer

50pcs 0.5*5mm series small spot spring 0.5mm wire compression pressure springs 0.5*5*(10/15/20/25/30/35/40/45/50) 3D printer