Factory sealed. 1 Set very high quality brand name replacement pulleys, not cheap bulk OEM generic no name. 

One complete set, 2 pulleys.

Designed and engineered to nearly identical appearance, weight, specifications & construction of original vintage Campagnolo pulleys.

High quality modern UV resistant durable resin plastic with precision low friction metal bushings and plates.

These are designed and manufactured by Shimano so you know they are time tested and race proven and manufactured to the highest quality control standards.

Fits many vintage derailleurs including Gran Sport, Ofmega, Sachs, Suntour, Shimano, Simplex, etc. Does not fit many C-Record, Huret and some Simplex.