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Black Dots work fine on both high pressure and low pressure cans, making thin lines from .8 inches-2 inches wide. The spray is a little softer than the Grey Dots but it's still an excellent outline cap. Black Dots also work good on the tall cans like MTN Mega and Maxxximo, which have really high pressure, and they won't clog like other skinny caps do on those types of cans.Black Dots work on almost all European brands and most American brands.