hemper tech universal cleaning plugs+caps for cleaning, storage, and odor proofing glass water pipes/rigs and more - (black) hemper tech hemper tech cleaning plugs and caps were specially designed to universally fit almost any glass piece, with any joint, whether male or female. make cleaning your glass bong fast, easy and hassle-free using klear cleaner + proprietary plugs and caps system for the quickest and easiest clean ever. what's included: 2 medium sized plugs (fits male and female joints) 1 large plug