features 2-way sharp closure-piercing device of the drip chamber with anti-slip surface that guarantees tight and reliable connection with containers/bags air inlet with anti-bacterial filter and a colored (red) flap pliable drip chamber dropper: 20 drops = 1 ml +/- 0,1 ml special blood filter with large area, pore size 200 μm min. 150 cm-long,…