The Empire Glass Toilet Bowl Piece is the sh!t! This hand crafted piece is made out of clear and opaque white borosilicate glass and it looks exactly like the porcelain thrones that we spend *roughly* 5767 hours on in a lifetime! This bowl slide is a 14mm male and will fit in any piece with a 14mm female joint. Empire Glassworks makes the coolest pieces and this toilet bowl slide is no exception!