This is an Elecom wrist rest. I bought it to use with a trackball, but I ended up not using it much. Achieve comfortable use anytime! "DUX" MMO Wrist Rest. Using jersey material on the surface, it's breathable and provides comfortable use anytime. It can be used on your wrist, arm, elbow, or any part you like. Adopts ultra-flexible material "EXGELR"! Supports long hours of play Adopts ultra-flexible material EXGELR (Exgel), also used in the medical field. It supports your wrist and arm with its excellent "body pressure 'flow' dispersion" performance. Also, its fluidity that gently conforms to any direction according to the movement of your hand does not hinder subtle movements. With its excellent body pressure dispersion function, it fits the shape of your wrist and arm, supporting long hours of play. Specifications Size: Width 138.0mm x Depth 81.0mm x Height 24.0mm Material: Surface: Chloroprene rubber, nylon / Back: Polyurethane / Internal body: Synthetic rubber Color: Black When you purchase, it is assumed that you have agreed to the requests and notices stated in the profile.