Akademik

gas burner consisting of a circular metal pipe with several small holes through which gas can escape to be burned

gas ring,

a hollow metal ring, with holes or jets through which gas is fed, usually used for simple cooking.

ˈgas ring 7 [gas ring gas rings] noun (especially BrE)

a round piece of metal with holes in it on the top of a gas cooker/stove, where the gas is lit to produce the flame for cooking