Check valve 200mm, galvanized steel, ventilation duct

Check valve 315mm metal, ventilation duct

£16.93

Winflex - Square flange Ø150mm anti-backflow, conduit, ventilation duct

£5.67

Winflex - Round duct connection with square flange check valve - Ø100mm

£3.90

Non-return valve 125mm, ventilation duct

£3.90

Winflex - Steel check valve 100mm, ventilation duct

£8.15

Non-return valve 150mm, ventilation duct

£4.25

WINFLEX - FLAT CHECK VALVE 55MMX110MM

£1.73

Non-return valve 100mm, ventilation duct

£3.19