1) 100% waterproof door frame 2) Free of formaldehyde 3) Never deformation 4) Inflaming retarding 5) Sound-insulation Features: 1) 100% waterproof door frame 2) Free of formaldehyde (reach CARB, F4 STARS standards) 3) Never deformation 4) Fire-resistance, moisture-proof, corruption-resistance, Mildew and Insects Proof 5) Sound-insulation, anti-oil 6) Can be cut, sticked, drilled, nailed etc 3 ...