This set of four Yanmar seat collars, with the manufacturer part number 198220-63280, is a great addition to any boat. These collars are OEM and have never been used, making them an ideal choice for anyone looking to upgrade their inboard engine. The brand Yanmar is known for its high-quality marine engines, and these seat collars are no exception. They are compatible with a variety of Yanmar engines, and their durable construction ensures that they will last for many years to come. Whether you are a professional mariner or a recreational boater, these seat collars are a must-have accessory for your boat.