Dunlop brake caliper piston housings, manufactured in high grade alloy which is then Anodised, these are then fitted with conventional Girling style Chrome Plated cup pistons or SS pistons & easily available seals using the same 4 bolt fitting arrangement that Dunlop used, so they are a direct replacement for the original.
These are fully FIA legal for DB4, E type & Mk2 Jaguars.
Not suitable for purists though.
Specify size which is stamped on the front of the original Dunlop caliper piston housing & chassis number.