Manfrotto 492 Micro Ball Head 204920 $59.99
Load: 4.41 lb (2.0 kg)
Spirit Level: No
Height: 2.36" (59.94mm)
Weight: 0.31 lb (0.14 kg)

Manfrotto 494 Mini Ball Head w RC2 QR Plate 204940 $79.99
Built-in Friction Control
Load: 8.82 lbs (4 kg)
Spirit Level: No
Height: 3.35" (8.5 cm)
Weight: 0.71 lbs (0.32 kg)

Manfrotto 496RC2 Compact Ball Head w 200PL-14 Plate 20496RC2 $99.99
Built-in Friction Control
Load: 13.23 lb (6.0 kg) 
Spirit Level: No
Height: 3.94" (100.07mm)
Weight: 0.93 lb (0.42 kg)

498RC2 Midi Ball Head w 200-PL-14 Plate 20498RC2 $136.99
Built-in Friction Control
Load: 17.64 lb (8 kg)
Spirit Level: Yes
Height: 4.92" (124.96mm)
Weight: 1.34 lb (0.61 kg)

Manfrotto 498RC4 Midi Ball Head w 410PL QR Plate 20498RC4 $149.99
Built-in Friction Control
Load: 17.64 lb (8 kg)
Spirit Level: Yes
Height: 5.31" (134.87mm)
Weight: 1.54 lb (.69 kg)