Heavy Patio Door Track Rollers
A quick learner from Merrillville IN says:
March 7, 2016
Might be Anderson. Only mark on part is an "A"
Paul from SWISCO responded:
March 9, 2016
Seeing as how this is for a heavy door, consider our 81-149 stainless steel patio glass door roller. This can carry doors weighing 150 pounds. I would just confirm that our specifications all match up to your roller.