Perforation 1620

Rv 1.6 – 3.5

Hole diameter: 1.6

Free cross-section: 20%

Perforation 2523

Rv 2.5 – 5

Hole diameter: 2.5

Free cross-section: 23%

Perforation 320

Rv 3 – 6.35

Hole diameter: 3

Free cross-section: 20%

Perforation 4551

Rv 4.5 – 6.0

Hole diameter: 4.5 mm

Free cross-section: 51%