Keep the dirt and grime out of your Tera44 or RockJock44 axle tubes with RCV Dana 44 tube seals. The kit comes complete with 2-re-buildable-tube seals, each with 3 O-ring seals on the outer and 2 washer seals on the inner. Rebuilding these seals is quick and painless. Easy access Zerk fitting is located on the sides to inject grease. Yellow anodized for beauty. Note:-** Made to fit the Teraflex44 3-1/4"x 1/2" -Currie RockJock44 3"x 3/8" Axle Tubes (2-1/4" diamater bore). Please see D44SK for standard Dana 30 -44 axle housings -ProRock with the .5" heavy tube wall option.