 "Manfrotto 501PLONG Long Quick Release Plate" 501plong on Markertek - America's Broadcast Supply House"
"<b>Manfrotto</b> <b>501PLONG</b> Long Quick Release Plate" 
 " Manfrotto 501PLONG Video Long Rapid Connect Mounting Plate "@en - Optics4Birding
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                            The Manfrotto 501PLONG rapid connect plate fits 501HDV and 701HDV video heads and extends the ability to balance cameras and spotting scopes.
                        "@en 