Type D diagnostic slides use a PTFE coating on the surface of the white glass slide to create circular holes of different pore sizes which, due to their hydrophobic properties, ensure that there is no cross contamination between the holes.
Specification
Size: 25.0x75.0mm Pre-cleaned. Polished edge, 45° angle. Marking surface: white painted. PLUS adhesive coating. 50 tablets/box, 1000 tablets/medium box, 2000 tablets/case. Hole design: 21 holes x Φ4.