Slotted duct (side exit) is available with and without covers in three sizes. The unique design of the hinged cover allows it to remain in an open position while fiber is installed in the duct. All sizes are 6? 3-3/8? long and are slotted at each end for snapping together or to fittings with a slotted joiner. Side exit slots run down both sides and are spaced approximately every 6 inches apart. Radius guides can be snapped into the side exit slot This item comes in a pack of 25.