If you're looking for replacement o-rings for your Kanger TOPTANK-Mini Tank, check these out! You can choose a full set of o-rings in either black or red for your TOPTANK. Mix-and-match, replace torn rings, or color-code your tanks by flavor type. Works great with the TOPTANK on our Kangter TOPBOX Mini TC-75 Starter Kit, too! At this price, grab a few sets!