The Intermediate Dog kennel was the first dog kennel we manufactured. Designed by outdoorsmen, endorsed by celebrities, this intermediate dog kennel sets the standard for built-to-last intermediate-sized dog kennels. Vent hole patterns differ among styles, please see photos displayed for the standard (1 3/8" hole size), with two finger holes in the back. Ventilation can be customized from the drop-down menu options. The intermediate dog kennel can be stacked and customized with the add-on options. Please note double door entry styles will add 1.5 inches to the normal dimensions.