The little rubber piece you're referring to is commonly known as a "grommet." Grommets are used to protect holes in various materials, provide insulation, or secure cables and wires. If you meant a specific type of rubber piece, please provide more context for a more accurate answer.
When samples of rubber first arrived in England, it was observed by Joseph Priestley, in 1770, that a piece of the material was good for rubbing out pencil marks, hence the name rubber.
heaven's little master piece
compressed spring
96 g
The Insulators in a torch is the rubber. I think.
The hard rubber would acquire a negative charge as electrons move from the wool to the rubber. Wool has a higher tendency to lose electrons, leaving the rubber with an excess of electrons and thus a negative charge.
there are different terminologies in different countries. in most Asian countries they are called Bushes....and in most western countries they are just called Rubber Supports........!
flexibly
A little piece of Scotland.
rubber
Grover Cleveland lost his jawbone to cancer and had it replaced with a piece of molded rubber.
its a bung