These Wizard (Western Auto) spark plugs are for Wisconsin have 2 ground electrodes.          You are bidding on 2 pcs

They fit the following models                                

6 hp ACN, HACN,   6.5 hp AKKN        7 hp  BKN, HBKN, HS-7D   7.25 hp S-7D    8 hp HS-8D     8.25 hp S-8D  9.2 hp AENL

10.1 hp  TR-10D  TRAL-10D,  10.5 hp  S-10D,  12 hp  TRA-12D,  12.5 hp  S-12D,  14.1 hp  S-14D,   18 hp  THD, THDM,  

18.2 hp  TJD   21.5 hp  VE4D  25 hp  VF4, VF4D,   30 hp VH4, VH4D, VH4DM   37 hp  VG4D    56 hp  VR4D