High quality steel keel, ceiling channel/profile from professional manufacturer--Wen'an City Xinxing Building Materials Co., Ltd High quality steel keel, ceiling channel/profile from professional manufacturer--Wen'an City Xinxing Building Materials Co., Ltd. Dry wall ceiling system: 1. Furring: channel: 38x22mm(12-38-12, H=22mm)2, 38 Main channel: 38x12mm3. Angle Channel: 25x25mmTogether with ...