Listing is for 1 Black vacuum/fuel hose spring clamp. Fits most Buick 60's-90's models. This is the 3/4" fuel hose clamp, will also fit a 5/8" inside diameter hose, it can be used on all GM cars and trucks from 1960-1987. It is used to connect your main fuel line to the gas tank sending unit at the back of the car and the fuel pump at the front of the car or your vapor line. WE SHIP WORLDWIDE!!!