Soft Down Drop Front Support Drop front support. Lids lower gently--never crushing fingers. Use one support per 43" /lbs. Figure" /lbs with this formula: (lid wt. X front to back size) divided by 2. Requires min. space of 6-3/4"H X 5-5/8" front to back, perfect for tight places. Reversible - can be used on either the right or left side.