Spanner Size: 16 mm; Thread Size: M12 x 1,25; Thread Length [mm]: 26,5; Spark Plug: Iridium Middle Electrode, 1 - Earthed Electrode, Interference Suppression 5 kOhm, with gasket seat, Fixed SAE connector; Spark Position [mm]: 5,0; TecDoc Engine Number: 33885; ALFA ROMEO: GIULIA (952_),Stelvio (949_); 50051491, 68292346AA, 0000050051491, 50051491; Engine spark plug,Spark plugs