Snap-On-NOT TESTED just has been stored away. Super clean unit. Original owner as is Snap On BF521A air filter air control unit spray equipment is a high-quality automotive tool design for air control and filtration. This unit including the necessary components for efficient, maintenance and upkeep of vehicles. A trusted brand, Snap-On and the specific manufacturer part number BF521A this product ensures reliability and durability for automotive applications, ideal for professionals and enthusiastic, looking for precision and effectiveness in their air, tools and supplies. 
