Creates a 1/4" x 3/16" caulk channel when installed against a substrate such as a concrete wall. Features a 5/16" tear-off leg that acts as a guide for the taping knife as well as a protective mask for mudding. Can also be used to cover expansion joints filled with fire or acoustical caulk. To be used with 5/8" drywall.
WARNING:Cancer and Reproductive Harm - www.P65Warnings.ca.gov