Product Descriptions: The standard shelving unit has a rugged design, capable of holding 350 pounds per shelf. This allows for easy organization and accessibility of parts. Available in various colors such as Blue, Yellow, Red, Green, Ivory or Black, the bins can be used to store items on either a 36"W x 12"D shelf or a 36"W x 18"D shelf. The 12-HQSB100, 8-HQSB101, 5-HQSB102, 4-HQSB107 and 3-HQSB109 bins fit across the 36"W x 12"D shelf, while the 8-HQSB103, 5-HQSB104, 4-HQSB108 and 3-HQSB110 bins are suited for the 36"W x 18"D shelf. This economical bin storage system includes durable plastic shelf bins along with a standard 36"W shelving unit. It provides an easy way to identify parts stored in the bins due to their durable design.