KV epoxy-coated roller slides. Sliding assembly is 1/2" think laminated melamine mounted on epoxy-coated slides and is fully assembled.

This Knape & Vogt roll out tray divider comes in white and is a simple, convenient way to access your kitchen supplies.
Tray Divider Roll-Out, 9" Wide, White
Product Dimensions: 19-1/2" high x 9" wide x 22" deep
• KV epoxy-coated roller slides
• Sliding base assembly is 1/2"-thick laminated melamine mounted on epoxy-coated slides and is fully assembled
• Heavy-gauge steel wire partitions section off storage areas