VENTS - METAL ROUND BACK VALVE �250

Marsoni

M251S

$21.18

Get it in 3 business days with 1 day shipping. Friday, May 29

VENTS - METAL ROUND BACK VALVE �250Backdraft spring loaded damper designed for automatic shutoff of the round ducts and preventing back draft of air when ventilation system is switched off. Damper vanes are opened with the pressure generated by air stream and are closed by the spring. With galvanized axis, and riffles to prevent spring displacement. 250

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So far so good! Our Belgian Malinois/Black Lab mix goes through other brands of squeaky tennis balls in a matter of days. Including the ones that cost 2.00 a piece. Thrilled to see that the first one is still intact after a couple of weeks of play. She must squeak them if they are in her mouth so they do get quite a workout. I would highly recommend them.

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Reviewed in the United States on April 21, 2026