This is for flyboard use. This is the Twin Blade impeller. Fly Series/TP Series by Solas. 

The Solas SRZ-TP-15/21A is a high-performance twin-prop (dual impeller) upgrade designed for Sea-Doo models with the 159mm jet pump.

It uses the same jet pump housing and wear ring as the single Concord series impellers

The required impeller wear ring (liner) is the Sea-Doo OEM part number 267000372 - 267000105

Applications:
RXP-X 260 2012-
RXT iS 260 / RXT-X 260 2009-
RXT 260 / RXT-X aS260 2009-
GTX LTD iS 255 2009-
RXP-X 255 2009-