The Caltar swivel umbrella adapter provides a 5/8 female mount both top and bottom.
One adapter with 1/4-20 and 3/8 male threads and one with 1/4-20 and 3/8 female threads.
A locking receptacle that will hold umbrella shafts up to nearly 1/2 (12mm) diameter.

Technical Details

Product Details

Package Dimensions
Width : 2 inch
Height : 2 inch
Length : 2 inch

Shipping Weight: 0 ounce (View shipping rates and policies)

ASIN : B01AKPHA8O