This Binks AX140S Air Motor Assembly is the perfect addition to your MX1231PU pump. It's specifically designed to enhance the performance of your pump while ensuring maximum output. The assembly is made of high-quality materials, making it a durable and reliable choice for your pumping needs. Has been tested and in good working order. With a focus on quality and efficiency, this air motor assembly will help you achieve your business goals. It has been tested and proven to work effectively, providing a smooth and consistent pumping experience. Don't miss out on the opportunity to enhance your pump's capabilities with this exceptional air motor assembly from Binks.