【High Airtightness Performance】 This building material has a high airtightness of 90K density, providing excellent insulation performance. 【Size and Quantity】 Each board is approximately 450mm x 450mm in size, and a total of 16 boards are included. It can handle large-scale construction. (Please note that there may be chips, stains, dents, and size differences due to being scrap materials.) 【About Shipping】 This product is offered with free shipping, so you can purchase it without worrying about additional costs. (Simple packaging with vinyl.) - Density: High airtightness 90K - Thickness: 25mm - Size: Approximately 450mm x 450mm - Quantity: 16 sheets - Shipping: Free Thank you for viewing. 【Remarks】 We also sell on other sites, so please understand that the item may be out of stock due to timing. Please consult us for changes in quantity or size. This is a bargain sale for inventory adjustment. We also handle other items such as 3, 9, 18, and 36 sheets, processed products, etc. We also handle clearance items. Click here for other products! If you want multiple items, please consult us through the question box. Easy to install to the desired size with a cutter, etc. Regarding bank transfers, if you choose to pay via ATM/convenience store, ■【Please be sure to】■ inform us of the scheduled transfer date within 24 hours. If we do not receive your notification, we will report it, delete the buyer, and block them. Insulation and sound absorption effect / Glass wool / Fiberglass Glass wool / Heat resistant / Fire resistant / Soundproof / Building materials / Renovation / Repair / Sound absorption / Cold weather measures / Heat stroke measures / Noise measures / Glass fiber / Construction / Temperature Glass cloth / Insulation material / Soundproofing material / Interior lining / Soundproof / Glass wool / Heat-resistant material / Repair material / Protection / Renovation / Sound absorption / Heat resistant / FRP cloth / Fiberglass / Fender / Exterior / Frame / Old folk house / Cowl / Tent / Sheet / Fabric / Thin / Car / Building materials / Surface / Glass fiber / Sound insulation / DIY / Detached house / Apartment / Heat stroke / Experience / Interior / Roofing / Hut / Animals / Roof / Karaoke box / Non-flammable/