length are 12cm/15cm/18cm/20cm/21cm/25cm/28cm/30cm/35cm/40cm/45cm/50cm product diameter normal are 2.0mm-6.0mm,flat, smoothy,round,point As different clients demands to process Outer Packing: With standard exporting carton and PE bags. Normal packing ways are 100pairs/PE bag 30bags/carton. Your personified packing is workable. Certificates: FSCI,CE, CIQ, EEC, FDA, LFGB,SGS