11-3/4" tall adjustable height channel bracket. Bracket material is High Strength/Low Alloy ASTM A572 Grade 50. There are 6 sets of holes allowing for 5-positions. Bracket is welded to a 2" sq x 1/4" thick wall x 9-1/2" long tube. Tubing is high quality ASTM A500 with a minimum tensile strength of 58,000 PSI and 23% elongation. The maximum height adjustment when used with PN 503 is 8-1/2" measured from the center of the receiver tube to the center of the Lock N Roll coupling shaft on your trailer.
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