Classic Plus is a very popular brand which has been established as the Standard acupuncture needle, 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. Classic Plus acupuncture needles hallmark is an incredibly finely polished surface to minimise discomfort. Traditional coiled and looped Copper Handle Pain Free Insertion Silicone Free Individual Guide Tube Excellent Value Boxes are not colour coded.