Chicago Rawhide CR Radial Shaft Plain Seal NSN 5330-00-613-6854 PN# 13548. Outside Diameter 1.878 inches nominal Accommodated Shaft Diameter 1.375 inches nominal Seal Width 0.235 inches minimum and 0.265 inches maximum Case Style Square Housing Bore Diameter 1.878 inches nominal Sealing Element Style Angular Material Steel case Material Rubber sealing element These are being sold at a great price. Save $$$$$ buying here and you also get L2B4 10326