FLUX built its reputation on FX Ink — a penetrating black ink formula that goes into the surface rather than sitting on top, making it one of the harder formulas to remove. The marker range covers the FX.PUMP industrial markers in 100I and 150I, the FX.MOP 200I industrial mop in screw cap and flip cap versions, a Mini Marker Black, empty bodies for self-filling, and FX.INK200 refill ink in 200ml. FLUX also does stickers — eggshell stickers in multiple colors and hologram in 50-packs, and System transit stickers shaped to match subway and train cars from Stockholm, New York, Copenhagen, the German S-Bahn, freight trains, and more in 200-packs.