Diameter = 2-9/16"
Length = 4-1/8"
Note:If the diffuser you're considering replacing is brittle and flakey, then it is recommended that the complete jet internal be replaced.This degradation is caused from an improper balance of Total Alkalinity, Ph and Calcium hardness. If the diffuser is brittle, then chances are other parts of the jet have been affected, such as the bearing raceway and internal clips
Another Note: The insert at the end of this diffuser is not included,
if this piece is needed, you will need to order a complete jet internal, it is not available by itself.
For complete Power Storm jet internals click on link below
Complete list of Power Storm jet internals