... guarantee Underflooring heating 100% Natural Real Hardwood UV lacquer, Aluminum Oxide E0, E1 grade Hickory Engineered Hardwood Flooring Species: Oak, Elm, Merbau, Teak, Cumara ... Thickness: 0.6-4mmGrade: AB, ABC, CD, etc.Core Layer: Hardwood plywood, HDF, etc.Bottom Layer: Beech, Cork, etc.Joint: T ... more than 3 types, each type no less than 500M2) Hickory Engineered Hardwood Flooring