Spark plug DENSO B6HS / W20FS-U

Wrench size: 21mm
Thread size: 14mm
Thread length: 12,7mm

Fits for most models:
ATALA
BMW
BAJAJ
BATAVUS
BENELLI
BOOM TRIKE
BULTACO
CARABELA
COSSACK
DKW
DUCATI
DUCSON
DURRKOPP
ENFIELD
ERING
FANTIC
GARELLI
GILERA
HUSQVARNA
JAWA
KTM
KYMCO
MBK
MALAGUTI
MOTO GUZZI
PIAGGIO/VESPA
PUCH
RIEJU
YAMAHA
ZUNDAPP

*May fit for other models.