(2) Flapper Sensor Torsion Springs for the FAWN FSI, USI & Vendnet 3548 Futura Combo Vending machine. If the drink selection keeps ripping off your customers - more than likely the spring is broke to the left of flapper. The spring keeps the flapper against switch. This lets the machine know that the product vended. If you own one of these machines these springs are a must have! The springs are new from factory!

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