MONO-RACKS are exactly what they sound like: single racks that contain all the elements needed for a functioning system. They come in 4-column Quad rack and 6-column Hex rack varieties. Beyond 6 columns we like to split them up into MULTI-RACKS...

SMALL Material columns are 4/5 x 36", 6L volume, and hold 3-5 lbs

MEDIUM Material columns are 5/6 x 42", 12L volume, and hold 5-10lbs