With its functional flower design this Canning Rack from Progressive keeps jars separated, reducing the chances of breaking during processing. The structure of this Canning Rack is highly versatile as it is reversible and can hold 4 oz., ½ pint, pint, and quart sized jars. One side of Progressive’s Canning Rack can hold up to four, quart sized jars, perfect for the small batch canner. The opposite side can hold seven, 4 oz., ½ pint, 12 oz. or pint sized jars. What makes this Canning Rack unique is the stacking feature. With two of these racks canners can load up one with short jars, then stack another rack and set of jars on top! This innovative design enables canners to process their bounty at twice the speed.