Metal 66 block apparatus box, fits one 4 x 50 or 6 x 50 block, includes metal, snap-on cover. Apparatus Box for 1 Connecting Block is used to terminate and fan out horizontal distribution cable.Furnished with a snap-on cover; distribution rings and mounting hardware These offer greater flexibility where space is limited Constructed of green metal Reversible snap on covers are provided with four pre-drilled and threaded holes for use in mounting cable clamps with the box Designed to be mounted on vertical flat surfaces of plywood, fiber board or masonary