The Riva heavy-duty, 100% stainless steel wear rings/impeller housing liners are the perfect replacement for your damaged original unit. Durable solid stainless steel construction resists debris damage and saltwater corrosion. Original Yamaha wear ring is constructed of cast aluminum with a thin stainless steel liner that is pressed into place. Corrosion quickly develops between the dissimilar metals swelling the thin liner until it closes down and jams against your impeller. When well cared for, our stainless steel wear rings will provide years of trouble free use. Directly replaces OEM part# 6ET-51312-00-00.