 "Manfrotto 502 Head Flat 3/8 Base"@en Base MVH502AH - Filmtools"@en
"
15.4 lb Weight Capacity
Counterbalance Supports 8.8 lb
Continuously Adjustable Pan/Tilt Drag
Pan Bar & Sliding Plate Included
Bridging Technology
Spring-Loaded Counter Balance
"@en 
 "Manfrotto 502HD Pro Video Head w/ Flat Base MVH502AH" " Manfrotto MVH502AH For sale! - EuroOptic.com
"This Manfrotto 502HD Pro Video Head with Flat Base has a 3/8-16" Connection and is designed for use with HDSLR cameras." 