BD Emerald 5ml Syringe Salient features of BD Emerald 5ml Syringe: Green Stopper & bold scale markings (to aid in setting an accurate dose). Clear barrel (to allow for visualisation of fluid). Robust retaining ring (to prevent accidental plunger rod pull out). Flange size & shape (to provide stability & comfort during use). Textured thumb press (to reduce slippage during administration).