Designed specifically for clear acoustic tube radios, Decibullz top rated DIY thermo-fit earpieces combine with Clear tube radio adapters to create a perfect fitting two-way radio earpiece that will stay in place no matter what you are doing. The adapter provides a seamless integration of both function and aesthetics. The adapters are designed to work with all clear tube acoustic tubing with a diameter of 1/8 inch (other sizes may or may not work). Perfect for law enforcement, firefighters, medical professionals, concert security, and any other activity or job that requires use of a clear tube radio earpiece. *CLEAR TUBE & RADIO NOT INCLUDED SPECIFICATIONS Weight 0.15 lbs Dimensions 4.5 x 3.5 x 1.25 in Included in Custom Mold Pack: 2 thermo-fit custom molds, triple flange silicone tips (S, M, L), set of foam tips, 1 radio adapter, 2 back plugs, and a carrying pouch. Included in non custom mold pack: 1 radio adapter, and triple flange silicone tips (S, M, L)