One of my previous adapters broke off in my carburetor, these are much thicker and heavier, I never see them break in carburetors. I wish they were a bit longer but actually they are exactly what they should be. Any shorter and there will be a problem. One of them seems to have some sort of material, like a sponge, wire type, I wouldn't be surprised if it just buffered the air before it hits the vacuum gauges. I have used them several times, they work as expected, I am satisfied.
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