Process:Rotational molding. Material: LLDPE Plastic Feature:Waterproof, Dustproof, Corrosion resistance, and Shocks absorption ²Excellent impact resistance, extreme temperatures endurance, shocks absorption, all sealed waterproof, dustproof ... the boxes are suitable foe all types of small equipments.Rotational molding , waterproof, convenient to stack. It applies for the instruments and ...