This blue plug has an ultra smooth finish and is pretty straightforward. This Cobalt Blue Plug is designed and constructed for the plug connoisseur. The 1" diameter plug features a 1 3/4" diameter maximum width and an approximate 3 3/4" total length. Don Wands Glass Pleasure Wands are waterproof, hypoallergenic, nonporous, ultra smooth and are phthalates free. Don Wands are made from borosilicate, which is more resistant to breaking than most traditional glass formulations. Don Wands Glass Pleasure Wands can be warmed or cooled to your preferred comfort zone and they maintain temperature for an extended period of time. For safety reasons, we suggest that you clean and inspect all of your glass pleasure wands before and after each use. Never use a damaged glass wand.