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This style of wet end is becoming more commonly requested. It is highly recognisable from it's moulded square block by the discharge.
Diameter : 97mm Vane gap : 15mm
Diameter : 105mm Vane gap : 14mm
You should also buy the US Seal lubricant to aid the fitting and extend the life of the new seal - shown in accessories.
Front face to fit Ultimax wet ends. 2" x 2"