... rubber piston (isoprene rubber) +sheath needleStandard: GB15810-2001 "single-use sterile syringes" eqv ISO7886-1: 1993Key Features: Biological ... the protective cover can be used.Packaging: Small Package: Single packaging: LDPE (low-pressure polyethylene) In packaging: 100 ... clear understanding of product failure, expired prohibited;D. Single packaging is damaged, a foreign body, protective cover ...