Illadelph Single Hole Bell Slides are the perfect bowl slides for your bong. They are made of thick, high quality borosilicate glass and come in a variety of different colors. These 14mm Male slides are a great upgrade for your Illadelph bong (or any other brand!) This Sea Blue colorway is a gorgeous transparent blue with periwinkle undertones. We are a licensed reseller of Illadelph glass and all Illadelph products we sell are guaranteed authentic.