THIS DUAL FUNCTION BRACKET IS TO BE USED ON THE EVOLVE TANK BRACKET SYSTEM TO MOUNT YOUR COMPRESSOR OR MOUNT YOUR TANK TO YOUR RIDE. THIS LISTING IS FOR ONE PAIR OF BRACKETS TO MOUNT 1 COMPRESSOR OR 1 TANK. IF YOU ARE MOUNTING 2 COMPRESSORS, THEN YOU WILL NEED TO ORDER 2 SETS. WORKS WITH VIAIR 280, 380, 400, 425, 444, 450, 460, 480 AND 485 COMPRESSORS. FINISH: RAW METAL (SEE OUR OTHER LISTINGS FOR POWDER COATED FINISHES)THIS PARTICULAR ITEM IS ONLY TO BE USED WITH THE EVOLVE TANK BRACKET SYSTEM AND WILL NOT FIT OTHER TANK BRACKET SYSTEM.