The 9101 low round seat has a full 14 inch round top and is made up of a special combination of foam for stability and comfort. 9000 Series Thrones feature DWs newly designed double locking clamp, vise lock seat clamp and an oversized 1 inch base for added stability. The 9101 is identical to the 9100M, but with an extra-low tripod base for low-seated players.