Specifications of acupuncture needle o Different lengths cun 0.5 1.5 2 2.5 3 4 5 6 mm 13 25 40 50 60 75 100 125 150Specifications of acupuncture needle • Different lengths cun 0.5 1 1.5 2 2.5 3 4 5 6 mm 13 25 40 50 60 75 100 125 150