Rectangular Tubing Straight Arm For Mounted Or Recessed Standard - For Use With Medium Weight (1/16") Or Heavy Weight (3/32") Universal Slotted Standards With 1/2" Slots On 1" Centers. Made Of 1/2" X 1-1/2" Rectangular Tubing. Can Be Used With Trac2000, Trac2001 And System 94. Available in Black, Chrome or Satin Chrome. Available lengths are 12" and 14". Set of 3