The Mack Turn Signal is a reliable and durable replacement for OEM# 1MR2201P2 and 1MR2201P1. With its 12V standard and modular plug-in feature, it allows for easy OEM replacements without the need for rewiring. This practical and efficient turn signal is sold individually and is suitable for most Mack truck applications. Trust in its reliability and enjoy the convenience it brings to your truck.