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The GFB 5702 whistling trumpet fits all GFB valves and encourages a more readily produced whistle than the 5701, operating at a slightly higher pitch. Like other trumpet options, it requires most of the air to vent through the trumpet to whistle; valves set to 50/50 venting may not generate the velocity needed. This trumpet offers a simple tone change for owners of compatible GFB valves.
GFB Whistling Trumpet (suits all valves)
