Seal (pair) for discontinued retainer 8N4248B. Seal is optional with A8NN4248B. (Retainer 8N4248B is replaced by A8NN4248A). Priced & Sold only in pairs. 8N4251B-PAIR$24.51 Davis Tractor Parts Ford 8N Dept 24263 Antioch Rd. Andalusia, AL 36421 Phone: 334-222-7214 Fax: 334-222-0025 Email: parts@davistractor.com