Brand: ZYLDDS Forehead Support Ophthalmic Equipment Accessories, Ophthalmic Lifting Chin Bracket, Lifting Forehead Support Chin Rest for Ophthalmic Auto Refractometer Vision ・Product Size: Front size 460*250mm, Bracket size: 115*105mm, Lifting height: 40mm, Front and back from chin support to top; 150mm to 190mm (see image). Height-adjustable white vision testing equipment - Type: Vision testing equipment - Color: White - Adjustment function: Height adjustable - Mounting method: Desk mount I was planning to use it at work, but I no longer need it, so I am selling it. Although it is unused, it has been stored personally, so please refrain from purchasing if you are sensitive to this. Thank you for viewing.