Pushbutton Miniature Control Operator, Operation Type Momentary, Body Material Shot Blast Copper Free Aluminum, Enclosure Class I Div 1 and 2 Group B C D, Class I Zone 1 2 Group IIA IIB, Class II Div 1 2 Group E F G, Class III, NEMA 4/7BCD/9EFG, Connection Size 3/8 Inch-16 TPI, Constructional Feature Explosionproof, Application Hazardous Location