New, improved type, genuine Mazda rain rail / water curtain, Mazda MX5 & Eunos Roadster 1989-2005.
This runs around the rear of the soft top and collects the rain water running off the roof and channels it to the drain holes beside the seatbelt towers.
Note that this is the latest specification part and is made of less brittle material than the early ones were.
NM00766. NC20-R1-560.