This dual purpose tray holds up to four standard size caulk tubes and gun as well as three spray cans up to 3” in diameter. Caulk gun holster is 2 1/2” square and holds standard caulk guns with or without tube in place. Convenient front storage tray measures 10 1/4”W x 2”D x 2”H. Mount these sturdy all steel trays to the end of a shelving unit near any cargo door for easy access without having to enter your van.