Product Features: - 100% borosilicate glass - 8 arm tree perc - Dual chamber design - Built-in ice catcher Meet the little brother of the 11" Dual Chamber Beaker Tube. The 8.5" Dual Chamber Beaker Concentrate Rig is proof that good things come in small packages. Each one has a built-in ice catcher and an 8 arm tree perc for even cleaner tokes.