Metcal n 700 series syringe barrels packs of 50 metcal 903 n these metcal 903 n 3cc 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 903 n 700 series syringe barrel 3cc natural pack of 50