This is the One piece design Miata convertible top with deck seams and overlapping quarter panels. Includes pre-punched plastic retainers to ease installation. The window on this item does not have a zipper. Fits all 1990-2005 Miata / MX5 convertibles. The convertible top will fit older model Miata's that original came with a plastic window. Connecting the defroster glass in these models is not recommended unless you purchase the Mazda 3-Wire Connector Part Number N007-67-060A from Mazda. However, you can still enjoy the glass window without the defroster.