Cartridges for E-Cigarettes Best4ecigs refill cartridges are available in: Brown Tip; compatible with Best4ecigs' Classic range (808 thread) of e-cigarettes Black Tip; compatible with any Best4ecigs' Magnum and Power+ range of e-cigarettes and all e-cigarette with a 510 thread The cartridges come in a wide variety of flavours including Tobacco, Cherry, Mango, Blueberry and many more! E-cig refill cartridges come in five different nicotine strengths too. MULTIBUY savings available!