This strap on is designed to stimulate two people at once with vibrations. Each unit (penis and vaginal plug) operate with independent multi-speed vibrators for tremendous stimulations and is made with the finest latex and filled with a firm but resilient foam. The sturdy harness is easily adjustable for comfort, and the unit is easily cleaned. The smaller cock is about 1 1/2 inches thick while the longer cock is 1 inch thick at the tip but thickens to 1 1/2 inches thick at the base. The main shaft is 6 1/2 inches long while the inner plug is 3 1/2 inches long