RM-D06 Rev Max Drive Axle Wheel Seal fits Mack 44000# See Cross Reference ChartNo Installation Tool Required! Can be installed by hand, tool, hammer, or any instrument of your choosing Comes with a FREE tube of a special seal bond that not only makes the seal easier to install but acts as a barrier to prevent future leaks Wider O. D. and wider I. D. provides larger sealing surface. 50% Thicker Seal Template on the back of the box for Semi Fluid Grease. Temperature Range: 40F to 225F; 40C to 107C Compatible with National 370031A,