Packaging：4-Pcs Double Lip Grease Seals. Scope of application：Compatible with 5200-7000lb Capacity – Replaces Dexter: 10-36 Transcom: 22333TB National: 452920/482920 NOK: AD3135E1/AD3135E0 (Measure Old Seal First!) Sealing: It can effectively prevent the leakage of liquids and gases such as lubricating oil and hydraulic oil in dynamic and static mating components, ensuring the stability of internal pressure. High-quality materials: Made of high quality NBR rubber and spring, steel construction,2-3 times the service life of ordinary oil seals and have been fully tested by the manufacturer, so you can choose with confidence. Confident Purchases:If you have any questions about the product, please contact us so that we can provide you with the best service.