We also sell on sites other than Mercari and our own website, so please refrain from direct purchase and confirm availability via comment. Tokyo Soundbox, specializing in unit-type soundproof rooms! **We have various information about soundproof rooms on our website for those who are 고민 (gomin - struggling) with purchasing and installing soundproof rooms.** You can also ask questions directly via our official LINE or phone from the HP. Search for "Tokyo Soundbox" and please take a look! Yamaha Avitex Sefine IIev High Type 2.5 tatami mats, -30db. ~Model Number~ AMCVA25C ~Size~ Outer dimensions: 1914 (with ventilation fan +170) x 2355 x 2288mm Inner dimensions: 1748 x 2189 x 2163mm ~Soundproofing Performance/Weight~ -30db, approx. 542kg About Delivery and Installation ・In addition to the main unit price, a basic installation fee of 74,000 yen (tax included) will be charged separately. (Additional fees may apply depending on the region, for installation, stair work, air conditioner work, and piano/desk carrying.) ・The position of the door and ventilation fan can be changed, so we will consider the layout to match your room and install it. ~Condition~ ・There are minor scratches and signs of use appropriate for the age, but there are no problems with soundproofing performance or use, and it is in a condition that can be used for a long time. For an accurate estimate of installation costs and if you wish to purchase, please contact us via official LINE, message, or comment with the following information. Due to regulations, we cannot post URLs, so please search for (株)Tokyo Soundbox and access our website. 1. Your installation address 2. Floor number and the presence of an elevator 3. Whether air conditioner work, piano/desk carrying work is required **About Soundproofing Enhancement and Renewal Options** (株)Tokyo Soundbox offers a variety of soundproofing enhancement and renewal options for soundproof rooms. ・Vibration isolation enhancement for the floor, sound absorption enhancement inside the room, soundproofing enhancement for the room's windows, ventilation outlets, and air conditioners ・Replacement of included equipment (carpet, lighting, ventilation fan) with new ones We will propose the best options according to your purpose and budget so that you can use the soundproof room comfortably and with peace of mind in a new environment. Thank you for your consideration.