The Nuke Firm is a huge, deep XL Toy that creates serious pressure and is amazingly intense from the moment you start to play. This version of the Nuke is much more advanced than the standard Nuke because of its firmness. With that said, the Nuke's pleasure explosion doesn't end at the first bulb, the second bulb tapers into a long and wide shaft for a fulfilling feeling the whole way down. Made of Tantus' own 100% Ultra-Premium Silicone, this is an advanced toy for people who demand quality from products they put in their bodies. Harness Compatible: Yes Safe For Your Body: Made from Tantus’ own unique formula of 100% Ultra-Premium Silicone Easy To Clean: Eco-Friendly, Hypoallergenic, Hygienic, Boilable, Bleachable and Dishwasher Safe. Max Head Diameter: 4” Min Diameter: 3" Base Diameter: 3.5“ Length: 11” Weight: 2 lb 13 oz