UniqBall UBH 45 Ballhead with a Built-In Leveling Base and Pan-Tilt Head Uniqball UBH 45 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: 600mm F/4, 800mm F/5.6, 200-400mm F/4, 500mm F/4, 400mm F/2.8, 300mm F/2.8, 100-400mm F/5.6, 50-500mm F/6.3 Telephoto Lenses Quick Release: Yes, Arca-type compatible Camera Mount Thread Size: 1/4"-20 Bubble Level: Yes