This Manfrotto 501PL Rapid Connect Sliding Plate is the replacement quick release plate for your National Geographic NGE2 ball head, Manfrotto 501, or Manfrotto 503 video fluid head. This long version of the standard plate allows perfect balance for camcorders. Rapid Connect Sliding Plate w/1/4- Inch- 20 & 3/8- InchFixing Screws. this plate replaces the Manfrotto 3433PL.