There are two water pump gaskets for this range of engines.
Water pump gasket for Kubota D905 D1005 D1105 D1105T V1205 V1305 V1505 V1505T engines . (6 bolts)
Jem Ref: WG5
Water pump gasket for Kubota Alternative Construction specification engine. (5 bolts)
Jem Ref: WG5C
Please ensure you chose the correct gasket for your application from the drop-down menu.