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GFB Whistling Trumpet (suits all valves)

Marsoni M251S
Sale price$40.41
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GFB Whistling Trumpet (suits all valves)The 5702 can be used in place of the standard trumpet on all GFB valves, and will make the whistling sound more readily than the 5701 (high boost and RPM is required to get the whistle from a 5701), and at a slightly higher pitch.? Like the 5701 however, it is necessary to run the valve so that all (or most) of the air vents through the trumpet ? Respons valves will typically not generate the velocity required to whistle when set to 50 50 venting.
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4.7 ★★★★★
Based on 1235 reviews
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Ann
Carnegie, US
★★★★★ 5
Sturdy & durable. Kept the inside of my vehicle dry from lake water
Size: 7.5 Feet x 9.5 Feet
I used it in the back of my RAV4 where I stored my kayak after taking it out of the water. Just used it to keep the vehicle dry. It’s sturdy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 1, 2026
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Verified Purchase
sarah
Dallas, US
★★★★★ 5
Good for keeping rain out of tent
Size: 9.5 Feet x 11.3 Feet
Easy to use. Kept the rain off my tent during a couple storms. Easy to tie down via grommets. Will use again for next camping trip.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
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Verified Purchase
Rose
Lake Worth, US
★★★★★ 5
Worked out great.
Size: 9.5 Feet x 11.3 Feet
Worked great
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Reviewed in the United States on May 9, 2026
P
Verified Purchase
pac
Grantham, US
★★★★★ 5
Worth its weight in gold
Color: Ocean Blue, Style: Everyday 3 Season 50-80° F
Great, left the wind & cold out. Kept me warm with 17* wind chill! Durable. Couldn’t have asked for better warmth made sitting @ watching a soccer game doable. It’s literally lite weight, has a convenient of a carrying bag.
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Reviewed in the United States on April 21, 2026
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Verified Purchase
Chantal
Alexandria, US
★★★★★ 5
Great sleeping bag
Color: Ocean Blue, Style: Everyday 3 Season 50-80° F
Great size for my 10 year old son. Nice and long. The material is soft and warm. The zipper zips fast. There is like a hoodie on the top to go over your head to keep you warm.
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Reviewed in the United States on April 29, 2026

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