The Nylon Sleeve is designed to fit into 2" x 2" square metal box section (SHS) that has a 2mm - 2.5mm wall thickness (12-14gauge). The Nylon Sleeve Inside Diameter is 1 3/4" to allow 1 3/4" metal box section to slide inside it. There are two holes either side of the Nylon Sleeve that will locate into pre-drilled holes within the outer 2" Square Box Section (SHS) to help lock the Nylon Sleeve into place using a short Self Tapping Screw
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