Just for men autostop hair colour a 45 dark brown is a foolproof haircolour which lets you pinpoint greys as it shuts itself off at just the right colour giving you the perfect results everytime easy to use just for men autostop hair colours are easy to use simply comb in the dye then the shampoo and notice the difference in just 10 minutes no mixing no mess does not contain ammonia or peroxide as an added bonus just for men autostop hair colours do not contain any peroxide or ammoni