The Chelsea 28-P-216 is a crucial output shaft oil seal designed for various Chelsea Power Take-Off (PTO) units, including the 429 Series. Measuring 2.004 inches x 1.25 inches x 0.374 inches, this high-quality seal prevents oil leaks and contamination, ensuring your PTO operates smoothly and efficiently. Its durable construction ensures long-lasting performance and reliability in heavy-duty truck and machinery applications.