Needle Valve / Briggs & Stratton 231855SPack Size:1Briggs & Stratton 231855S, Briggs & Stratton 231855NHC 262-7686, Oregon 49-210, Rotary 10944Briggs & Stratton 286702, 286707, 289707, 28B702, 28B707, 28M707, 28N707, 28N777 and 28P777Ethanol: Not compatible with greater than 10% ethanol fuel, Viton-tipped style