Metal Adjustable Arm Clamp - Black Overall Dimensions:1.25"W x 2.75"D x 4.5H Clamp Mounts Easily to All Studio Designs Tables Powder Coated Steel for Durability Works with the Studio Combo Lamp(12315,12316) Swing Arm Lamp(12021,12023) and Magnifying Lamp(12309) Overall Dimensions:1.25"W x 2.75"D x 4.5H Clamp Mounts Easily to All Studio Designs Tables Powder Coated Steel for Durability Works with the Studio Combo Lamp(12315,12316) Swing Arm Lamp(12021,12023) and Magnifying Lamp(12309)