This device features a semi enclosed stainless steel flat bar design head piece. It also features enlarged vent holes on the sides for quick finger tip alightment adjustments. Head piece it 58mm/2.28". It comes with two double width base rings 52/48mm/2.04/1.88". Also included are (2) waist straps and a high quality Burg Wachter cylinder lock. This is a new never worn device that I make as a hobby. I have worn a similar device for several years. The double base ring reduces sagging and twisting. The waist band is amazing for holding up the weight of the device and allows you to wear a larger less restrictive base ring. This makes it more comfortable to sleep in and exersize. Flat bar cage design reduces pinching and chaffing. $300
