The EGO BIOHAWK grip covers are made of soft silicone-like material and are designed for use with Cheyenne Hawk grips for ultimate comfort when tattooing with Cheyenne Hawk machines. Each grip cover is individually sterile blister packed so that it is fully disposable. NOTE: It is recommended that Vaseline be applied to the inner surface of the grip cover for easy and smooth pulling over the Cheyenne Hawk grip.