Permanently mount lab-frames directly to the wall, floor or benchtop accepts up to 1/2" (12.7mm) and #8200;diameter rods. Includes three mounting screws. Dimensions and #8200;(Dia. x H): 2 3/4" x 1 1/4" (70 x 32mm) Connect rods and / or clamps to your frame or build a custom lab frame Use with 1/2" (12.7mm) diameter frame rods.