The TeraFlex high performance front axle tube seal is designed exclusively for the oversized 3.25" O.D. axle tubes found on Tera30 and Tera44 JK replacement housings. The outer triple O ring tube seal presses into the housing and provides a positive mud and water barrier. The inner double axle seal surface is designed with a cavity between the seal surfaces to form a grease filled pocket providing lubrication for the seals and provides another barrier to mud and grime. These are the same seals that were developed, proven and currently used in many NASCAR applications. The axle tube seal is fully compatible with all available Rubicon and non-Rubicon axle shafts, including 27 spline Dana 30 up to aftermarket 1.5" 35 spline Dana 44 shafts. The billet 6061-T6 aluminum seal housing is laser etched with graphics and black hard anodized for superior corrosion resistance. Fits Tera30 and Tera44 axles. Specify axle tube thickness.