<https://acuprime.com/shop/acupuncture/needles/plastic-handle-needles/seirin-j-type-japanese-acupuncture-needles/#product>
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"- Strong and Reliable: High-quality surgical stainless steel\r\n- Coloured Plastic Handle: Strong plastic handle with colours according to size\r\n- Individual Packaging: One needle per blister with a guide tube\r\n- Choice of Sizes: Pick from five lengths and seven widths\r\n- Pack Size: Each box contains 100 needles ideal for professional practices"
<https://acuprime.com/shop/acupuncture/needles/plastic-handle-needles/seirin-j-type-japanese-acupuncture-needles/>