Steel U-Trim is ideal for covering the jagged mill edges of expanded metal and perforated steel sheets giving your project that professional finished look. Steel U-Trim is formed from 18GA steel sheet and is available 1" wide with openings of 1/16" (for 16ga - 18ga Flat Expanded or Perforated), 1/8" (for 13ga - 9ga Flat Expanded or Perforated and 16ga - 18ga Raised Expanded), and 1/4" (for 13ga - 9ga Raised Expanded). Stock lengths are 4ft, 8ft, and 12ft.