... windows: ash, larch, okoume, spapelli, cherry, russian red pine Solid wooden window/ doorAluminium solid composite window/ doorMain colors for solid wood ... ; Q2<1.5Wateproof capabilityGB/T7108-2002, Grade 4, 350≤ P<700Heat preserving Capability GB/T8484-2002, Grade 7, 3.0 ... CapabilityGB/T8485-2002, Grade 4, 35≤ RW<40 solid wooden window/ door