Twin leading shoe brakes use two wheel cylinders per wheel, but you buy them singly. These cylinders are the 15/16" diameter style that will fit MK1/2/3 models 1964 on with .9375" bore size with 1 1/2" shoes.
Sold with bleed nipple but require
37H3833 gasket, 2 required per wheel left hand side only but sold singly.