National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today's vehicles. Product Features:Unbeatable protection for wheel end systemsFeatures Fel-Pro sealing technologyAramid fiber and PTFE coating reduces repair timeHighly resistant to compression setEnsures superior sealing to hub face and positive lube retention in cavityTemperature range: -400F to 550F; -240C to 288C