... : 7-9% 4.AB Grade 1. 3-Layer Prefinished Bamboo Flooring,AB Grade,Natural Color2.specification: ... 7-9%4.AB Grade ProductionItem name: 3-layer Bamboo engineered flooring,Horizontal,Carbonized specification: :15 ... x 190 x 1860mm Construction:4 mm top layer bamboo Horizontal, carbonizedfir stickers 9 mm thickness ... areas; easy installation; 3-Layer Prefinished Bamboo Flooring,AB Grade,Natural Color,