... .C: 7-9% 4.AB Grade 1. 3-Layer Prefinished Bamboo Flooring,AB Grade,Natural Color2.specification: :15/4 x 190 x ... .C: 7-9%4.AB Grade ProductionItem name: 3-layer Bamboo engineered flooring,Horizontal,Carbonized specification: :15/4 x 190 x 1860mm Construction ... refinished; can be laid in all residential areas; easy installation; 3-Layer Prefinished Bamboo Flooring,AB Grade,Natural Color,