【Important】It appears to be glass, but it's likely a material called Delaglass A. Methacrylic resin extruded sheet (Asahi Kasei Chemicals) An elderly relative is retiring from oil painting, so I am selling this item. #Oil painting frames I am selling are here For F4 size Almost unused. The manufacturer is unknown. Measured by an amateur, Inner dimensions: 338 x 248 Outer dimensions: 546 x 445 Weight: Approximately 800g The "tombo" (frame fasteners) and hanging hardware show no signs of use. The included hanging string is the one that came with the purchase, and its strength is unknown. We recommend replacing it when you use it. If you have any questions about the condition of this item before purchasing, please feel free to ask. I will answer as best as I can. Returns, exchanges, and price reductions are not possible. #Frame #GlassPlate #ShippingIncluded #AnonymousShipping #OilPainting #F4 #Pegasus #na405223 #Delaglass #Size4 Seller Management Number: GK01