G221 is a versatile EPDM rubber air hose. It is among our most popular hoses and finds widespread use in industrial, agricultural, construction, and marine applications. G221 is a flexible and lightweight hose compared to G222 and features two-spiral reinforcement in sizes up to 3/8″ and four-spiral reinforcement in sizes 1/2″ and above. G221 Multi-Purpose is used for air tools, nailers, and staplers.