The Pulsar Rainbow Twist Downstem features bright, colourful rainbow twist designs and are made with durable borosilicate glass. The downstem has a built-in diffuser at the bottom for bubbly water filtration, and each piece is compatible with any 14mm male slide and 19mm female pipe. This item is sold as a 24 piece display with assorted colours and lengths, giving your customers a variety to choose from! *Please Note: Downstem length is measured from from the bottom of the ground joint to the end of the diffuser. Pulsar Rainbow Downstem Features: Sizes - 4" | 4.5" | 5" Joint Size: 19mm Outer | 14mm Inner Glass Downstem Diffusers Rainbow Twist Design 24 Piece Display Assorted Sizes & Colours