Master Cock Four Stage Rocket 12 inches Dildo from XR Brands. The Four Stage Rocket Dildo is a great new challenge for any big toy enthusiast. This huge cock has four widening ripples that offer incredible stimulation during use. It is made of high quality PVC and even has a suction cup base for hands free operations. The PVC allows the dildo to be flexible so it can move right along with you. Measurements: 12.5 inches in total length, 12 inches insertion, 3.6 inches in diameter. Material: PVC. Color Black.