4" Glass Butt PlugWhether youre experienced with anal play or just a newbie, the Glas 4 Butt Plug features graduated bulbs to allow you to work your way up to bigger toys or experience the different sensations that different sizes offer. Each Glas toy is fracture resistant and hypoallergenic, as well as being easy to clean. This toy retains heat and cold to add temperature play to your bedroom action.