This is a 2-1/2" Schedule 80 PVC Tank Adapter with Viton gasket. Ends are slip x slip. CIS has this and many more Bulkhead Fittings in stock and in the sizes you're looking for. Give us a call for any questions or a quote! , Size: 2-1/2" , Material: PVC, Gasket: Viton, End Type: Socket, Max Pressure: 150 psi