Complete Kit – Comes with impeller, O-ring and shaft seal for smooth installation and optimal function – no extra tools required Durable Materials – Built with high-quality rubber and copper components for long-lasting, reliable operation under demanding conditions Perfect Fit Replacement – Precisely designed to replace Milwaukee Part #49-16-2771, this impeller and O-ring kit ensures seamless compatibility with Milwaukee M18 Transfer Pumps Quick& Easy Installation - Simple drop-in design allows for hassle-free replacement, minimizing downtime and effort Customer Service - We strive to provide you with best quaility product and customer experience as possible. Any questions, please contact us directly Impeller & O-Ring Kit & Oil Seal Complete Repair Kit, Fully Compatible with Milwaukee M18 Transfer Pumps , Replaces 49-16-2771