Classic Plus is a very popular needle and has establisted its self as standard in acupuncture needles, widely used in hospitals and clinics worldwide. Each needle is encased within its own guide tube and makes use of a colour-coded tab for easy gauge/thickness identification. Contains Nickel. Classic Plus acupuncture needles hallmark is an incredibly finely polished surface to minimise discomfort. Copper Coiled Loop-End Handle Pain Free Insertion 100% Silicon Free