New old stock spark plug.  Listing is for two plugs, not two boxes of plugs. 

• Briggs & Stratton: GAS ENGINES -- All models except twin cylinder, Vanguard Intek, 19A400-19G400 series
• Kohler: GAS ENGINES -- 4.0/K90, K91, 6.25/K141, 7.0/K161, L161, 8.0/K181, L181, 12.5/K330, K331, 24.0/K660, K662, Magnum series
• Onan: GAS ENGINES -- 0.3TL-212R/1A
• Tecumseh: GAS ENGINES -- AV520, AV600, TVS600, TVS840,TVXL840, HMSK70, 80, 90, 100, HSK30, 35, 40,50, 60, 70, HM70, 80, 85, 90, 100, HMSK70, 80, 85, 90, 100, 105, 110, HS40, 50, HSSK40, 50, H50, 60, 70, 80, ECV100, 105, 110, 120, LEV80, 100, 115, 120, TNT100, 120, TVM195, 220, TVS75, 90, 100, 105, 115, 120, TVXL105, 115,VKS100, VLV40, 50, 55, 60, 65 and 66