The small door gap of the sliding window doors means a small section door seal is required. This bulb-type seal is an improvement over the original sponge seal. It is smaller in section than most seals offered for this application and is stocked based on our experience fitting them. Fits either side. Fits very well and stays in place. Black rubber. Fits all Minis with sliding windows including Mk1 & Mk2 Sedan, Van, Pickup, and Wagons. Sold each.