Billet aluminum crankcase drain block-off plate for Kawasaki 650 and 750 Jet Ski engines. This is a must have for all of those old 650 and 750 engines with the crankcase drain. The rubber seals and plunger get dried out over time and lose their ability to seal causing an air leak. This is an easy fix and replacement when you have your engine out for a rebuild. Sold as shown, anodized in black with orings and stainless mounting hardware. Made in-house in the USA!