Steering Arm Replace

[1988250coastal]

I am new to this forum, so my question may have been answered in the past. I have a pair of 150 Yamaha outboards which I am replacing the steering arms on. I am unsure of the correct arms to purchase.
I have found there are two different arms available for my engines. One is a 150EXTG, the other is a L150ETXG. Listed as replacement steering arms is a UR Long, and the other says UR Ultra Long. How do I know which is the proper application. Any assistance is greatly appreciated.

[boats.net]

Long is 20 inch shaft length
Ultra long is 25 inch shaft length
Super Ultra long is 30 inch shaft length
Your motor 150ETXG is a 25 inch shaft length and would need the Ultra Long.

[1988250coastal]

Thanks for the info. I spoke with a rep from Boats.net after I posted this and Dustin was helpful with this also. Now I am just waiting for the parts to show up on the doorstep. A little bit redfaced for overlooking the simple stuff.