Centering flange for aluminum tarping system is made of heavy-duty plastic. 3 3/8" in diameter, 1 1/4" wide, 2 1/8" x 1 3/16 ridged center. Has three 3 7/16" holes on either side and screw hole on one end.
Rubber tarp centering flange for steel systems that has a round hole in the center can be purchased here.
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