Sinner's Tattoo Supply proudly carries Kwadron Needle Cartridges. KWADRON is a Polish company and a leading manufacturer and distributor of cartridges, needles, inks, equipment and accessories for tattooing. Thanks to high quality products that reach our recipients every day, we could gain the trust of our customers who have been accompanying us for over a dozen years. Kwadron has earned a well-deserved reputation in the tattoo industry for producing high-quality products – and that reputation started with the Kwadron needles. Made from surgical steel, Kwadron needles are known for being extremely sharp, precise, and durable enough to produce great results through hours of tattooing. When their cartridges hit the market, they lived up to the Kwadron reputation, delivering the same great results.