It is a kind of Plastic which looks like glass. Acrylic is Durable, non Fragile and Light Weight. Our acrylic bong comes with High Gloss premium finish which is achieved thru high quality polish material and skilled workmanship. And Moksha Bongs always comes with all the fittings to make bong ready to use. Our bong include Metal Bowl & Stem, Metal screen fitted into bowl to hold your material and rubber and 1 pc of extra grommet. These bongs come in an assortment of colors so each purchase is a pleasant surprise! Bong shooter a common joint size for all acrylic and ceramic bongs. All 4 pcs in a set may not be of same colors as shown in picture.