Take strap-on sex to the extreme with the Pipedream Fetish Fantasy Extreme Hollow 12â   Strap-on. This heavy duty hollow strap-on features a 12" long, 2.5" thick phthalate-free rubber dong, held in place by a steel o-ring and leather harness. The comfortable leather harness easily adjusts to fit most sizes, while the durable metal O-rings hold everything together. A long hollow plastic tube, measuring 1.5" in diameter, is placed inside the rubber dong, making it perfect for both sexes to wear. Anyone who says size doesn't matter hasn't experienced this massive strap-on!