I purchased this recently, and it just arrived, but it seems difficult to install in my current residence, so I am putting it up for sale. The socket is a common type and seemed like it would install without any problems, but the part in the fourth image, which is attached to the ceiling with screws, was difficult in my room. I have only opened the package, so the images and the following description are borrowed from the previous seller. --- Vintage National post-modern glass pendant light. Approximately 50 cm in diameter. It can be hung with a wire. Length is adjustable. You can attach it to a duct rail if you purchase a socket. Separate purchase required. The condition is that the glass is frosted, and there are some stains. There are no cracks or damage. This is not recommended for those who are concerned about these things or who are looking for a perfect product. Although the brand and era are unknown, it has a Scandinavian design and post-modern atmosphere that seems to be from Yamagiwa Lighting. Koizumi Daiko Artek Isamu Noguchi akari Louis Poulsen Anglepoise Inzone Actus ACTUS Conran Shop idee Fritz Hansen unico MUJI Yamagiwa Scandinavian Marimekko Arne Jacobsen Panton Light astep Jean Prouvé fans Yamagiwa Industrial friso kramer Friso Kramer Robin Day Rietveld Jasper Morrison enzo mari tomado Netherlands Vintage Shigeru Uchida Mario Botta mariobotta Shiro Kuramata Sottsass Comme des Garçons idee Idee Postmodern POSTMODERN Space Age zanotta Zanotta thonet space age magis kartell artek artemide Vico Magistretti Verner Panton Bauhaus Marcel Breuer flos Mid-century Eames hans due jo hammerborg Jo Hammerborg Verner Panton Fog & Morup louis poulsen Louis Poulsen lyfa horn nordisk solar artemide