... :Waterproof, Dustproof, Corrosion resistance, and Shocks absorption 1. Rotational molding plastic ,import LLDPE material , excellent impact resistance, ... , all sealed waterproof, dustproof and corrosion resistance. Rotationally moulded, reinforced corner and edge designed to resist shock impacts, ... . 4. We have large , medium ,small cases, and special cases for any instruments. And we could make any ...