Highly polished pressed 304 grade stainless steel butterfly vents with chrome plated brass, side mounted knob which controls the rear overlapping plate to vary the ventilation gaps.
| BLA Code | Diameter mm | Protrusion mm | Mount Screws mm |
|---|---|---|---|
| 175348 | 102 | 19 | 3 r/h |
| 175350 | 127 | 19 | 3 r/h |