E-Z to use extra long brush for convenience E-Z to use bottle graphics for mixing accuracy E-Z to use mixing ratios for 2, 3, and 4 stage applications E-Z to use counter display to promote customer relations E-Z protection with NEW child safety lid Touch-Up Bottles are made of HDPE Shatterproof Platics (safer than glass) Touch-Up Bottles fit most Air Brush guns for quick and easy touch-ups