Tantus’ first realistic vibrating O2 Dual Density toy, Alan looks – and feels – remarkably real. Alan also features a harness compatible base, and includes a waterproof vibrating bullet and a Silicone Suction Cup. Tantus’ Realistic O2 Toys feature detailed skin texture, pores, veins, and wrinkles in three realistic skin colors. These Dual Density Toys are made of 100% Ultra-Premium Silicone with a Super SoftTM outer layer and firm inner core. 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. Diameter: 1.54" Insertable Length: 6.5"