The multi-sex strap-on system for men and women. Add thickness and length. The material is rigid enough to hold shape, but soft enough for sexual comfort. Comfortable and stretchable straps to hold it in place. Available in 6 or 7 1/2 inches. Made from non-phthalate body safe material, which includes Doc's anti-bacterial Sil-A-Gel formula and is proudly made in America. Designed for use with or without an erection. Inner diameter is 1.70in.