Vape Rings Silicone Anti Slip Band for RBA RDA Tank Mechanical Mods These Vape Rings are a simple design. The anti slip rubber helps you with those hard to turn mod locks. Directly fit on your mechanical mod or rebuildable atomizers. Also serves as a bumper for your tanks and can save your mod from minor scratches. Gives extra grip when holding your mod as well, especially in wet conditions. Vape Ring Rubber Silicone Anti Slip RBA RDA Tank Mechanical Mod. Sizeinner diameter 21mm 0.826 Inch Package include: 25pcs Rubber Silicone Ring Band  Note: we send mix colors/designs by random!