Officially licensed Boston Red Sox Toll-Tag cover. Toll Tag Covers are specially designed to wrap around all transponders used by motorists or truckers to drive through tolls without stopping. Our licensed covers are designed to specifically meet ALL Federal Standards for toll signals to be read right thru the transponder. The plastic wrap measures 4 x 4.5 inches and works with transponders for gated communities, access points and toll roads such as E-Z Pass, I-Pass, and Smart Tag. Patented product made in the USA.