Roller,0.625 in. Ia aluminum alloy rod er fed spec qq-a-225/8temper t651,finish,roller only,e512 per mil spec mil-f-14072,color,iridescent golden,yoke,0.500 in. By 1.500 in. Aluminum alloy bar perfed spec,qq-a-200/8,tempe t651,5.038 in. Lg,1.533 zn. H,0.625 in.W,provides pressure on film traversing the film drive roller