1. Rotating male luer provodes convenient and fast connection; 2. Transparant cylinder enhances visual efficiency of gauge mark and contrast; 3. Special designed silicon piston head and lubricating technology lead the plunger easy to move in ctlinder and high pressure resistance; 4. Thumb and finger rings fulfill precise does control; 5. A new model of control syringe which is easier and more preciser for the doctor to control is in development. More Product Features Trademark: Sunmed Model NO.: SM-CS-12 Standard: 12ml Origin: China Company: Sunny Medical Device (Shenzhen) Co.,Ltd.