Astro Pneumatic. Grey Pneumatic. John Dow JDL-3655 Grease Pump, Air Operated, 60:1 Ratio, fits 400 lb. Professional Quality. Designed for 35 lb. grease containers. JDL-3640 60:1 grease pump. We are not responsible for examining or evaluating the content or accuracy and we do not warrant and will not have any liability or responsibility for any third-party materials or websites, or for any other materials, products, or services of third-parties.