Threaded adapter (male thread x female thread) in 1-1/2 x 1-1/4" and 1-1/2 x 1-1/2" sizes;For use with Labline acid waste systems;High-performance mechanical-joint system;Corrosion-resistant, all-plastic construction;Easy to install, disassemble and reuse;Ideal for modular systems and remodeling;NSF listed