– Creates a positive seal that cannot be bounced or jarred loose.
– Tight seal virtually locks out dirt, rust and other engine damaging matter.
How It Works: As the handle is turned clockwise, the bottom plate moves upward. This action causes the grooved rubber body to expand, completing a firm, positive, air-tight seal. Release with a simple counter-clockwise turn of the handle.
FITS FILLER I.D.: 2.5"