This 1-1/2" C-clamp (coupling) offers quick, secure pipe mounting and is designed to be used with the Premier Mounts range of Ceiling Mounts and Projector Mounts. When used it replaces the standard Ceiling Plate supplied. The clamp is black to match the other components, supports up to 75Kg and is attached to fittings by 1/2" steel bolts and self-locking nuts.