Walnut engineered flooring:top veneer 0.6mm,2mm,3mm,4mm,etc. Specification ... 8-15mm( as customer's request) Structure:multi-layer engineered floorTop layer: 0.6mm,2mm,3mm,4mm,etc.Specification: ... beech,Red Oak,Cherry,Maple,Birch,Teak,Sapele, Americal Walnut,hickory,chinese maple,all species available.Glue:E1 ,WBPTreffert, ... base plywood making , making groove/tenon and Click syste WALNUT wood flooring