TRW pushrods

I have TRW pushrods pn# 48814 and the only length I can find listed is 7.492 hydraulic with adjustable rockers. My calipers aren't big enough to measure these right, I am concerned because the length listed by comp cams for their pushrods for this applicaion is 7.389. So, which is correct? Do they have different methods of measuring them? Someone please help...