Phenolic Amal Carburetor Insulator 28mm Triumph Norton BSA thin Norton Drive Ducati's original part number for

Ducati's original part number for the rust-prone black versions was 0440-12-013

A beautiful rendition of the cast aluminum cap

supplied with male adaptors for both large BA square adjusters (singles

Shouldn't show or affect use once installed

Phenolic Amal Carburetor Insulator 28mm Triumph Norton BSA thin Norton Drive Ducati's original part number forTriumph BSA part number 70 7819. (Any earlier part numbers for a 28mm insulator supersede) Typically used between carb and manifold for 250 single, 500 twin and some single carb 650. American made, GUARANTEED to fit. Thickness 1 16". Thicker versions available in another listing.