http://acratech.net/home.php?cat=2
Weighs 1/2 lb (.24kg).
Easily holds over 25 lbs. (11.4 kg).
Allows 10 degrees of movement in any direction.
Precision C.N.C. machined.
Beautiful satin black anodized finish.
Fits all standard tripods (3/8-16 threads).
Fits all standard 3/8-16 tripod heads (1/4-20 model also available).
Solid precision feel.
Made in U.S.A.
Ball will not shift when tightened.
Oilless and greaseless ball will not attract or hold dirt and debris.
Smooth knob action for easy and secure positioning.
Precision bulls eye level for accurate positioning.
All knobs are secured so they cannot vibrate loose and fall off.
Low profile design, only 1.77” tall (not including stud).
149 dols