Our self-adhesive vinyl pipe markers are made of flexible, resilient, 4 mil thick vinyl with a strong adhesive backing. Resistant to weather, moisture and corrosive conditions. Designed for indoor and outdoor use and adheres to most clean, dry surfaces. These style b pipe markers are 1. 125"x8" in size, with . 75" letter/cap height, and made for pipe diameters of 1. 5" to 2"