ETAILS - SPECS: Update your semi with enhanced axle protection and lubricant leakage prevention, with the National 370003A Red 37 Series Wheel Seal for 38,000 lb-48,000 lb Drive Axles that ensures you're Ready for the Road Ahead. Due to its ability to tightly fit inside the hub assembly, this replacement wheel seal effectively prevents contaminants from entering the wheel, while locking in lubricant. Molded with weather and heat-resistant rubber for optimal durability and performance in challenging climates. For 38,000 lb - 48,000 lb trailer axles DYNAMIC EDGE pumping feature shields seal from contamination Firm grip to shaft with SURE-LOCK I.D. rib technology Single spring-loaded sealing lip maintains placement of lubrication within hub Structural integrity with lip protection thanks to unitized construction TOOL ADAPTER # RD-305 CROSSOVER - INTERCHANGE - COMPATIBLE WITH: STEMCO 393-0173 STEMCO 393-0273 STEMCO 393-0373 STEMCO 392-9131 STEMCO 309-0973 DANA 304/861 NATIONAL 370034A NATIONAL 370086A NATIONAL B370003BG3 SKF 43875 SKF 45152 SKF 47691 SKF 47692 SKF 47693 SKF 47695 SKF 47697