Uxcell Storage and Organization Product, Desktop PC (a12121300ux0258) Top Dia. : 55mm / 2. 2"; Bottom Dia. : 70mm / 2. 75"; Install Hole Dia. : 60mm / 2. 4"Hole Size(Approx. ): 20 x 17mm / 0. 8" x 0. 7" (L*W); Height: 14mm / 0. 55" Adjustable grommets neatly feeds wires way from desktops and work surfaces. Different size openings to accommodate any size wire, cable, or cord. Use for replacement or new installation. Tames wires and increases desk space.