A quick learner from King William, VA says:
May 27, 2016
I have mounting brackets that are two different colors, but they are the same. They can accommodate a 1 inch wide slider (attached to my drawer.) The standard bracket at Lowes are just a little too small. The bracket says G* 6620, and to the right it has an R inside a circle with a number 3 above it. I need an extra set of these brackets because one of them broke. The problem I have been running into is the width of these are not the 1 inch that I need.
Tom from SWISCO responded:
June 1, 2016
Please see our 32-089 drawer socket pair. These have an opening size of 1" and are the same length as yours.