Designed for use on most standard nVent HOFFMAN Type 4 and 12 enclosures to secure the door in an open position. Enclosures must have a “B” dimension of 16.00 in. (406 mm) or more and a door which opens horizontally. Door Stop Kit is not intended for use on Concept window door enclosures, or enclosures configured with a swing-out panel or swing-out rack frame. Door stop kit is not intended for use in high-wind conditions.