Johnson Pump impeller for F4 pump. For cooling water.<br /><br />• impeller 09-810B-1 <br />• for F4 pump<br />• replaces Jabsco no.: 18653-0001<br />• outer Ø: 50.8 mm (U)<br />• inner Ø: 12.0 (A)<br />• length: 22.0 mm (S)<br />• material: MC97/EPDM rubber compound