Polaris 280 K30 or K25 O-ring size

[Pontiac]

For the Polaris 280.
Dose anyone know what size O-ring comes with the K30 Feed Pipe or the K25 "Jets", called the Water Management System?
Both parts are sold with the O-ring, but I only need the O-ring. And I believe both parts use the same O-ring.

 

[ohaya]

It doesn't look like it comes as a separate part for the 280, but I wonder if the one for the 360 feed pipe would work? That is part #[FONT=&quot]9-100-5132 and works with both the 360 and 380.[/FONT]