Details and FAQs on the COVID-19 Response website.
At room temperature, the ball fits effortlessly through the ring. However, after heating (via, say, the propane torch), the engorged ball becomes too large to fit back through the ring.
At room temperature, the ball fits effortlessly through the ring. However, after heating (via, say, the propane torch), the engorged ball becomes too large to fit back through the ring.