Original Style, Slotted Screw Clamp, MGB radiator hose, 1 3/8" to 1 9/16"
Wire-Type Hose Clamp 1 3/8" to 1 9/16" with slotted screw fastener. (most reproduction wire clamps have hex head fasteners, those are not original)
Early MGB requires 6
Later MGB requires 4
Also used for heater box drain tube