Which one is this right opening crank arm

Question

All I know is the the entry guard and truth msrkingd are on it. And I think the number20810 is what it reads .  I appreciate response asap if possible thankyou

Bob · Accepted Answer

Thanks for writing in. I'm pretty sure this is our 39-031 and 39-032 Split-Arm Operators. Just look over all the dimensions listed to make sure. Let me know if anything differs.