5 pounds and i did not want to ruin the neewer ballhead adapter as it will work just fine for lighter camera systems and has a better functioning arcaswiss quick release system see below

I bought this ballhead adapter as an upgrade to the ballhead adapter found on the neewer carbon fiber 66 inches tripod monopod with 360 degree ball headfluid video head14 quick release plate and bubble level including bag for dslr cameravideo camcorder up to 26

5 pounds hereafter called the neewer ballhead as i needed to tighten the neewer ballhead adapter way too tightly to stabilize a lensstabilizer system that maybe got to 1015 pounds well below what neewer ballhead and tripod was rated for 26

The grip on the eagle eye ballhead was much stronger