This is a replacement arm for the SwitchBot Bot (Smart Switch) if the original arm breaks. ★The SwitchBot body shown in the photo is not included. ★This is a set of 3 white arms. ・This product is made using a 3D printer. Please assess the quality based on the photos. There is no test data for strength or durability. ・The material is PETG (glycol-modified polyethylene terephthalate) with a slightly subdued gloss. ・The photos with the SwitchBot body show the product attached. ・Disassemble the main unit and attach the arm by hand to the motor shaft (from the protruding side of the arm), then press it against a desk or similar surface to make the shaft head and the arm surface fit snugly. A precision Phillips and flathead screwdriver are helpful for disassembly. #uu's SwitchBot Arm List