From kabar in the sense of covering; a cloth (as netted (compare makber)) -- thick cloth.
see HEBREW kabar
see HEBREW makber
H4346. mikbar
מִכְבָּר noun masculine grating or lattice-work, construct מִכְבַּר; — Exodus 27:4 and thou shalt make for it (the altar of burnt-offering in the tabernacle) נְהשֶׁת רֶשֶׁת מַעֲשֵׂה מִכְבָּר a grating, (even) a network of bronze, which surrounded the lower half of the altar (27:5 b): so 38:4; הַנְּחשֶׁת מִכְבַּר 35:16; 38:5, 30; 39:39.