Slide diaphragm (membrane) for Mikuni BST40 carburetors.
Genuine Mikuni from Japan, high quality part.
Suzuki part number: 13507-07D01.
This fits: the 1991-1992 Suzuki GSX-R1100 bikes with the OEM BST40 carburetors.
You will get: 1 diaphragm.
Complete as pictured.