UNIVERSAL CROSSBAR 4" FLAT RND. 
Universal flat-round crossbar that has 4" across and 3" tall. 
It has 6 threaded holes 8/32" each and spaced as follows: 
2 outside holes are 3 1/4" center to center, 2 inside holes are 2 1/4" center to center and vertical holes are 2 3/4" center to center. 
$2 minimum charge orders less than $20. 
$.50 packing charge for each parts box.