Clear Loop D Loop Concentrate RigRed Eye Glass Clear Loop D Loop Concentrate Rig Here we have the beautiful Clear Loop D Loop Concentrate Rig from the team at Red Eye Glass. Available in small, medium and large and finished in clear with the eye catching Red Eye Glass logo on the top tube. Other features include 14. 5mm male rig joint size, 14. 5mm glass dabbing nail and 14. 5mm female slash cut vapour dome. This superbly simple concentrate rig is made entirely from high quality