When sourcing Storz nozzles, you must prioritize material durability and pressure ratings. Ensure the body is made of high-grade aluminum alloy (forged or die-cast) or corrosion-resistant brass for marine environments. The working pressure should typically be rated at 16 bar (232 psi), with a burst pressure exceeding 48 bar. Additionally, verify the Storz size (e.g., 38mm, 52mm, 65mm, 75mm) to ensure it matches your existing hose couplings, and check for adjustable spray patterns (Jet, Spray, and Shut-off) to meet diverse firefighting needs.