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![Winch](https://images.findtheneedle.co.uk/findtheneedle/products/10717970.jpg)
Various types of Non-Return Valves / Flap Valves as listed below range between 100 mm to 3000 mm subject to the actual Non-Return Valve / Flap Valve aperture. Ranges will be determined and all Flap Valve widths and depths are available in rectangular format. On larger Flap Valves the need for a Winch Assembly can be supplied for un-restricted flow or maintenance purposes.
For more information on Winch talk to Treble R Fabrications
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