1980's Campagnolo crank arms in excellent used condition. Some cosmetic wear is evident. The mildly worn chainrings are 53-43 and utilize a 144mm bolt hole circle diameter. Length is 170mm. Pedal threads are 9/16 x 20F. The F refers to threads per inch. These cranks accept a standard British threaded 9/16" pedal. A square taper type bottom bracket would mate with set of cranks. Italian made, state of the art for decades. Campi components were the highest quality available during this time period. The box may or may not be original to these cranks....Cheers!