Engineered Hardwood Flooring American Oak 3mm dry sawn cut wood layer 7"width × 3/4"(18mm)thickness × RL, full length 33%-50% Micro-beveled Wired brushed Matte UV Bona Finished Tongue and groove profile, nail down installation with glue assist is recommended Limited 35 years finish warranty, lifetime structural warranty Hydronic radiant heat compatible Indoor Air Quality Certified: FloorScore CarbⅡ Character