This is a zipper unit for 7-hole boots (leather: brown, size 8 zipper, antique gold hardware). It was made with the assumption that it would be used on Oro Legacy leather boots like the Red Wing 875. The back is closed, and the tongue is designed to prevent damage from the zipper. Please look at the images to determine if it will fit your boots. The hole spacing is approximately 20mm from the center of one hole to the center of the next. It can be installed on Red Wing boots from men's US size 4 to 13. (For larger sizes with more eyelets, the top eyelets may remain unused.) It can also be installed on Danner Field Low and RW Beckman, although the top may stick out slightly (confirmed with the old Beckman 9022). It will be shipped via Yu-Packet Post or Yu-Packet Post Mini. Material: Genuine leather