The Leofoto HB-70 Professional Heavy-Duty Ball Head is precision machined from high-grade aluminum and has an ergonomic giant main lock for easy operation. The ball head features silky smoothness and great stability, perfect for supporting heavy gear. The ball has three separate knobs for locking the ball, tension control and the panning base lock. It features a precision super large ball that offers up to 88 lb maximum payload. The HB-70 is Leofoto's heaviest ballhead weighing in at 2.11 lbs or 960g. Specifications: Ball diameter: 70mm/ 2.75"Panning base diameter: 81mm/ 3.18"Height: 138mm/ 5.43"Mounting hole: UNC3/8"-16Max load: 40kg/ 88lbWeight: 960g/ 2.11lb Leofoto HB-70 70mm Heavy Duty Ball Head w/Quick Release Plate & Case, Max Load 88lb HB-70