Sierra Auto Tops BMW 1987-1993 3 Series (E30) Convertible Top, TwillFast II Canvas, Black BMW 3 Series convertible top with factory original features and perfect fit Made from the non-original but high quality Haartz Twillfast II cloth topping material The DOT rated slightly green tint plastic window is sewn in and double stitched for durability Metal spring coils are sewn into a pocket around the window for the factory contour below rear window Front corners are reinforced for added durability and longer life