Product Features: - 100% borosilicate glass - Fits a 10mm joint - 110mm long - Built-in diffuser slits - Red Eye Glass® logo decal Looking for a 110mm long downstem that fits in your 10mm joint? These Red Eye Glass® downstems are made of 100% borosilicate glass and are compatible with the 8.5" Dual Chamber Beaker Concentrate Rig