Fits both 40NB and 50NB posts.  Simply clamps around the post at whichever height you prefer.  Tighten the bolts and the hoop is set.
Related products
$99.90
Accessories
Price range: $24.90 through $29.90
$36.90
$15.50
$18.50
Accessories
$20.00
Balls
$15.50
Balls
$29.90