- Brass core vent with Slot and Hole in the diameters 6,8,10,12,14,15,16,18,20,22,25,30,40 mm (height 7mm)
- Steel core vent with Slot Size 0.3 mm in the diameters 6,8,10,12,14,15,16,18,20,25,30.40 mm (height 10mm)