Get one of these if you like a strong snappy hit from your bong rather than soft bubbly pull. High-grade borosilicate glass and strong sandblasted joints make it less likely to break, but it's always a good idea to have extra downstems on hand just in case! When ordering, choose your desired joint size from the drop down menu. Where the two joints are different sizes, the first number refers to the joint that attaches to your bong, and the second is the joint at the top where you place your bowl or other add-on. This allows you to adapt a bowl or attachment to fit your bong even if it isn't the matching joint size. The lengths are 25cm and 29cm, depending on the joint size you pick. Remember that the length of a downtube is always measured from the top of the lower joint down to the tip. If the downtube is too long for your bong, you can trim it yourself at home using G-Spot's Glass Cutter. G-Spot Glass has been a player in the business of building a better bong since 2000. Based in Germany, they manufacture and supply premium glass bongs, accessories and handpipes of the highest quality at a mid-level price!