MODEL 301B is a sturdy, wall-mounted pump. It draws from any size container. Delivers one fluid ounce of liquid chemical with each stroke of pump. Chamber is always filled, assuring fast, accurate service. Body is molded of a corrosion-resistant polypropylene. All working parts are silicone, stainless steel or PVC. Ready to install, with 8' of polyvinyl supply tubing and mounting screws.