iStick 50w Silicone Sleeve Grip 2 Pack Multi-Color Bundle (Black/Blue) Striped design for a better grip, and a nicer look. You can set down your mod on any surface with this non-slip protective cover. Authentic eLeaf iSitck 50W Silicone Case. Very comfortable feel. Precision cut to exact fit for all buttons, the screen, and vent holes.