This is a Certified HP Genuine Replacement Part.
HP DESIGNJET 500, 510, 800 Carriage Belt Kit (42" plotters) C7770-60014
HP Designjet 500 510 800 Service Station C7769-60149
HP Designjet 500 510 800 Carriage Belt 42" C7770-60014
HP DESIGNJET 500, 510, 800 Carriage Belt Kit for 24" Plotters
HP Designjet 500 510 800 Carriage Belt 24" C7769-60182