Impact Resistant Hard Sided Cases. NANUK tough cases were designed with one objective in mind: survival. With rounded corners, thick wall construction and oversized details, NANUK durable hard sided cases are built to absorb the shocks without damaging the case or more importantly your contents. Based on Plasticase’s years of experience in the plastics industry, our new NK-7 resin durable cases were developed specifically for the demanding conditions that NANUK will be exposed to. Highly impact resistant, lightweight, and rugged, our NK-7 resin tough hard sided cases can withstand nature’s extremes. No matter the application, NANUK durable protective cases clearly offer superior performance. Rugged, dependable, and efficient; NANUK impact resistant and tough hard sided cases will never let you down.