With design flexibility in mind, the heavy-duty chrome mixer lift can be attached to any custom made shelf allowing a perfect match to your counter top or interior cabinet. Revered as the \"best in the industry\", the RAS-ML-HDCR features built-in shock dampeners, adjustable spring tension and holds appliances up to 60 lbs. The heavy-duty chrome mixer lift must be installed in a full-height cabinet with NO drawer above. It will NOT work in a cabinet with a drawer. The lift system can be used with many different cabinet widths with a minimum base cabinet frame opening of 12-1/2 inches. To determine shelf size measure the distance between mounting plates when installed minus 1-1/4 inches. Mounting plates are 1 inch W. Recommended length of shelf is a minimum of 20-1/2 inches. Please note that a 20-1/2 inch or larger cabinet length/depth is required to accommodate this minimum recommended shelf length of 20-1/2 inches. Instructions, hardware, and left and right lifting arms Included. Shelf and Mixer NOT included.