1 long Velocity stack tube Amal 389 carb monoblock 1950s to 1967 Triumph BSA * Type:New The ID of the threaded

The ID of the threaded end is 1 13/16"

Manufacturer Part Number: SC-18322

and we supplied pictures of how the ends can look after you make the connections

Surface Finish: ZINC

1 long Velocity stack tube Amal 389 carb monoblock 1950s to 1967 Triumph BSA * Type:New The ID of the threadedYou will get one brand new aluminum stack as pictured. This is threaded to screw onto your 389 monoblock carb. This measures 2 3 8" long plus the convex screen which sticks out 5 8". These are Made in the UK and are quality spun aluminum. Condition: NEW Brand: STEADFAST CYLCLES Country Region of Manufacture: UNITED KINGDOM Manufacturer Part Number: SC V389 Surface Finish: ALUMINUM