40/10M.B35K10 WEB DRIVE SPROCKET CAST IORN SPLIT TYPE BORE 35mm KEY 10mm

M TYPE MEANS IT DRIVES ON THE BARS 

THE FIRST NUMBER IS THE PITCH

THE SECOUND NUMBER IN THE DESCRIPTION IS THE NUMBER OF TEETH

IN THIS CASE THE SPROCKET IS PRE BORED TO 35mm

IN THIS CASE THE SPROCKET IS KEYED WAYED TO 10mm

SPLIT TYPE EASY MOUNTING