Sliding Window Roller, 1/2" Convex Wheel

Do you have anything like this I have bought several hard to find items from you over the years

Hi I am unsure of what brand my windows are. I have been unable to find any markings but I am looking for replacement parts for these windows. I'm looking for replacement rollers. I have used part #87-003 with decent results but I am wondering if there is anything closer than that? I run a apartmen ... (cont.)

I have some sliding windows from the 1970's. The only markings are on it are on the latch which says, "New Englander". I think I've identified the replacement rollers but want to double check with the experts. Have included a pic of the lower rail. There is a small raised section in the center. ... (cont.)

Hi I have been trying to find these rollers for a few weeks and ordered a few from you guys but they are slightly different in a very small way so I took pictures as best as I could to see if you can help me out ......I also need these rollers too

Hi, I'm looking for some rollers (shown in images) from wood windows. The dimensions are: housing height (depth in frame)= 12mm | 7/16" housing length 37mm | 1-7/16" housing width 7mm | 5/16" roller height above housing 3mm | 1/8"