Tandem sliding door rollers

Hi All, I do not see any markings on the roller assembly. It is well made vs all the replacements I have found in Home Depot, Lowe's, etc. The roller diameters are 1 5/16". Overall fastening hole center to hole center is 5 15/16". The rollers are made of solid metal. The sliding door is very rough/hard to open and close and not able to adjust the rollers up and down enough to align the door properly.

I have tried the home depot version: Roller Assembly, 1-1/4 in. Tandem Wheels, Concave Edge, Steel Ball Bearings, Adjustable

The rollers were smaller and the assembly was poorly made vs the current version. Also, I was not able to adjust the balls low enough to clear the bottom threshold to put the door back in place.