LOOKING FOR 5/8 SASH GUIDES

Thanks for posting. This Top Sash Guide is a little unusual, and unfortunately we don't have an exact replacement for it. According to our records, the closest match is our 18-171. The hole positions seem to be similar, though I am not certain about the top hole. It lacks the top cap your old top sash guide has; however that will not affect function, it's just an aesthetic difference. It simply means you'd just have a little gap at the top of corners of your sash. Look over the dimensions listed on the 18-171 product page, and let us know if you think this could work for you.