There are a few factors to take in to consideration when choosing a new glass bong downstem.

Size: Firstly you need to determine the correct size that you require; this is referring to the size of the ground glass joint. If you need help in determining the correct size joint you require please refer to our "Glass Grinding Sizes Guide" here.

Length: The length of the stem is equally as important and must be chosen correctly, if a stem too long is selected it will hit the bottom of the bong and the ground joints will not be able to create a seal and this will greatly affect the function of your waterpipe. If a stem that is too short is chosen it may not be long enough to reach the water and you will be forced to overfill the bang and this will affect the form and function of its design.

Style: The last thing is choosing what design function you would like the stem to have. There are multiple choices here, you can go for the traditional standard stem with only a single open hole on the end of the stem which will provide the least amount of diffusion. The most popular choice is the six slit diffused stems as they provide a decent amount of diffusion while still being simple to maintain. There is then the more exotic choices such as the 21 hole and multiple arm stems that produce the most diffusion and thus providing the most pleasant experience.

If you are not familiar with the standard ground glass joints, you can simply measure them to determine what size you have or require. You can learn about how to measure and determine the sizes in our "Glass Grinding Sizes Guide" here.