X-Pert Pro Top-Insert 45MM - Chrome - PX45CR-0016 Xpole X-Pert Pro PX Set - 45mm Top Adaptor New - from XPole and Beverlyheels.com Please measure the space INSIDE your pole where the top-insert goes to make sure you know what size x-pole you have Please see the sizing of the 3 adaptors: 40mm Pole adapter is 35mm wide to fit INSIDE your pole 45mm Pole adapter is 40mm wide to fit INSIDE your pole 50mm Pole adapter is 46mm wide to fit INSIDE your pole