The new 3 gallon design filler makes it easier to fill or flush gearcases. Translucent plastic container allows you to check tank oil level. Sturdy tear-drop design resists tipping over. Includes the check valve venting system. The check valve on the vent allows you to remove the filler nozzle without loosing any appreciable amount of lubricant. Includes 551-33CV E-Z Fill® and 551-33HA (listed below).