Metcal n 700 series syringe barrels packs of 50 metcal 930 n these metcal 930 n 30cc syringe barrels have a unique ultra low construction of the inner diameter yielding high accuracy and stability the syringes are made from industry compliant silicone and chloride free low friction polypropylene metcal 930 n 700 series syringe barrel 30cc natural pack of 50