Model Number: LSD- Brand Name: Genuin Key Specifications/Special Features: Air flow adjustable aluminum linear slot diffuser, with inner movable blinds for air flow adjustmentThere are two types:One slot 39mm, two slots 79mm, three slots 118mm, four slots 157mm, and five slots 196mmOne slot 45mm, two slots 90mm, three slots 135mm, four slots 180mm, five slots 225mmLength defined at will, right end parts, corner parts are available