axle

well after a long time and noisy suspention the car is going to the shop on tuesday. it is getting the ball joints remplace, new axles, and alig. my question is thatthere is to different axle 23 or 26 pinfor the end. which one would it be for a 91 civic dx 4d 5spd. i bought the 26 because everytime i look online i always see the 26. i just want to know before i take it to the shop
thank guys and ladies