The Mix Inlet O-ring of a Stoelting soft serve machine creates a seal between the carburetor and the feed hole of the hopper. This seal allows you to control the amount of product that travels from the hopper into the freezing cylinder. Fits Stoelting Models: 0111, 0231, 0411, 0431, 0431RC, 238R, E111, E131, E131-YG, F131, F131-YG, F144, F231, F431, SF144, SU444, and U431.
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