Product DescriptionAn innovative alternative to regular metal screens, these glass screens will never break nor clog. Heat absorbing glass blocks offensive lighter fuel for cleaner, cooler inhales. The reflective glass surface heats the bottom of your tobacco for a fuller, more robust flavor. Hate the taste of ash in your throat? Simply drop a glass jack screen into the pipe and you're ready to go. About an 1/8 of an inch across and comes in a 3 pack of assorted colors.