Troystudio Acoustic Panel: Dense Thick Soundproofing And Sound, 6 Pack. Product Details ?BASIC INFO? - Size: 16 x 12 x 0.5 Inches, pack of 6, covering 7.7 square feet; Weight of each tile: 0.21kg (0.46 pounds). Density: 150kg/m3 (9.4lb/ft3). Material: 100% Polyester Fiber ?OUTSTANDING ACOUSTIC PERFORMANCE? - The sound dampening panels are dense and thick; Great at cancelling room reverb, echoes, standing waves, and noise; NRC(noise reduction coefficient): 0.87. Average absorption coefficient: 0.77 ?ECO-FRIENDLY and SAFE INDOOR USE? - The sound panels are Odorless, Non-toxic, and Formaldehyde-free. Flame retardant class: B1; Excellent acoustic treatment for home theater, podcast voice overs recording studio, office, nursery, classroom and more ?EASY CUT and INSTALLATION? - The Sound insulation panels are easy to cut with a sharp knife and mount on walls ceilings using 3M spray adhesive or 3M vhb double-sided tape(sold separately) ?NO-WORRY POLICY? - If these acoustic tiles don't work for your case, just click "Contact Seller". We support 100% refund or free replacement within 30 days, with no question asked Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.