Concise Bible Dictionary:
Isaiah 19:9 margin reads “white works” it is any woven work full of holes. In the brazen altar there was a grate of net-work made of brass (Ex. 27:4; Ex. 38:4); and in the temple there was network of brass along with checker work and chain work, as ornaments on the chapiters of the pillars, which were carried away to Babylon (1 Kings 7:18,20,41-42; Jer. 52:22-23).