Greetings. I have been looking for a pair of rollers for one of our Better Bilt sliding windows. Although our rollers are brass, not steel, I believe your 16-180 Sliding Window Roller Assembly has the same dimensions and design as what we are looking for.
Our white nylon platform is 1 5/8" long and 9/16" wide. The screw holes are 1 3/16 apart on center. The rollers themselves are 3/8 in diameter, and the flat contact surface appears to measure 9/32" wide. The axels appear to be 5/32" in diameter, and the overall width of the axel appears to be 19/32".
If you have these in brass, we would like to order them. If they only come in steel, we'll order them anyway. I have one more picture, a side view, which I am forwarding in a separate message.
Please let me know if we've found our window roller assembly, and we'll get our order in straight away. Thanks,