Hoist class (ISO 4301-1) M5 Color coating Main body: Metallic gray (Eqivarent to Munsell N4.0) Hook block: Munsell 7.5YR 7/14 Push button: Equivarent to Munsell 7.5YR 7/13 Ambient air temperature *** - 10 C ∼ 40 C (Non congelation) Ambient air humidity