UniqBall UBH 35 Ballhead with a Built-In Leveling Base and Pan-Tilt Head, 33lbs / 14.97kg Load Capacity, 2.2" / 5.59cm Base Diameter Uniqball UBH 35 Ballhead with a Built-In Leveling Base and Pan-Tilt Head - Quick Release Plate- X Adapter- Soft Bag- User Manual - Uniqball 3 Year Limited Warranty (1 + 2 Year with Registration) Compatibility: 100-400mm F5.6, 50-500mm F/6.3, 300mm F/4, 300mm F/2.8, 400mm F/5.6, 70-200mm F/2.8, 120-300mm F/2.8, 80-400mm F/5.6, 200mm F/2, 400mm F/4 Medium Sized Telephoto Lenses Quick Release: Yes, Arca-type compatible Camera Mount Thread Size: 1/4"-20 Bubble Level: Yes