100pcs/set Silicone Shockproof Tattoo Rubber Ring for Coil Tattoo Machine O-rings

1)Easy and practical to use
2)A must-have item for tattoo work
3)Specifically designed for tattoo machine

Description:
1)Made of rubber, durable for use
2)Can efficiency reduce jitter
3)Diameter: Approx. 13mm (0.5")