The GEAR High Profile Multi-Hole Diffuser Downstems are made of 100% borosilicate glass, and feature multiple holes at the tip for excellent smoke diffusion. Colour of logo will vary. Features: • 100% borosilicate glass • Joint size: 19mm • Ground joint • Fits 19mm pull-out • Length: multiple sizes available • High Profile design • Diffuser holes for added filtration • GEAR® decal