SBT Replacement Mikuni I Body Accelerator Pump Diaphragm (Round)

This diaphragm is used to replace the hard to find O.E external fuel accelerator pump diaphragm that are used on the Sea-Doo 951 & Yamaha 44I I-body Carbs.

There are two different diaphragm options that could have been used. Please look at the pictures to identify yours.