High-quality wide double-size box spring sheet from Otsuka Kagu, the Rrtena N・Rosa series. Purchased last year at the Ginza store. Stored in a closet. Unopened. This is a very high-quality item, and I believe it's a quality that is difficult to obtain. - Brand: Artena - Product Name: N・Rosa - Size: Double (WDL) 153 x 203 x 48 - Quality: High-quality Egyptian extra-long staple cotton. Thank you for looking.