Complete Tractor Thermostat Gasket For Kubota B21; B7300Hsd; B7400Hsd; Bx1800D; 100% new thermostat gasket meets OEM quality for tractors and farm equipment 1-year warranty covers you throughout planting and harvesting seasons Factory direct pricing delivers an honest value for hard-earned money Replaces OEM Numbers: Kubota: 15531-73270, 15676-73270, 15676-73272, 16851-73270 Specs: Inside Diameter : 1.375, Center-to-Center Mounting hole : 2.309 in