Description:Seal plate for use in A/C connections.Attributes:• Steel with HNBR seal• Zinc plated• Inside Diameter: 15.42 mm (0.61 in)• For use with 12.7 mm (0.50 in) OD tube• Hole Size: 9.2 mm (0.36 in)Application:Consult your owners manual or contact your local Cat Dealer for more information.