Air Seeder Hose Primary 2.5″ (sold in 100ft rolls). Our primary hoses are the best on the market, lasting 2x – 3x longer than any other hose during internal sandblast testing. Constructed with a urethane lining in place of the ‘blended’ materials used by OEM & competitor hoses. UV protection to withstand sunlight decay. Transparent black, see-through spirals in material allows you to detect/locate blockages immediately.