20x Honeycomb Screens.3/8\" (7-9mm2mm) smoke screens. Honeycomb pure glass
Multi-Hole Design Improves Air Flow Over Entire Bowl * Shields User From Hot Flying Bits * Reliably Stays In Pipe After Only 3-4 Uses * Excellent Repair Tool For Broken Out Bowl Holes * Size: 7-9mm Diameter x 2mm Thickness