Please assist in identifying correct replacement carriage....

Dear Hardware Guru,

I THOUGHT this was an Anderson door carriage? And then, I ordered the incorrect replacement part... (#81-128). Note that this carriage has the "dog ear" fastener on the ends (whereas part #81-128) fastens THROUGH the carriage assembly. So, I'm not certain what door I have (other than a BIG heavy door), and your assistance in identifying the correct replacement part would be appreciated. Sorry that I didn't place a scale rule when taking the original images!

Thanks Tom... sure looks identical.

Follow up question.

I note that part number 81-149 is the SS version of this carriage. My door is 4'x7' and is very heavy. Is the SS capable of withstanding a greater load bearing; or, is the SS simply the same load bearing capacity as 81-018, but "rust free"?

If the SS is capable of greater load, I'll likely purchase that version. If both the same, i'll stick with your 81-018, as the door connects two interior spaces and is not subject to moisture.

Please advise.

Thanks!
best,
Lanny

Got it. Thanks!