| 摘要 |
An apparatus includes a cylindrical body that is formed from soft and resilient material and has a smooth outer surface provided with surface indicia coated thereon that has a fluorescent color for drawing attention thereto. The body further has a bore formed therein that extends through the length thereof and has an open and a closed end portion. An aperture is formed in the body that penetrates the body and terminates laterally of the bore. A sleeve formed from rigid material is nested within the bore, confronts an interior surface of the body and spans between the open and closed end portions of the body. A tether is included that has opposed end portions connected to the body and the valve assembly. The tether is attached proximate to one end portion of the body such that the apparatus can be detached while the tether remains engaged with the valve assembly.
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