... are made of high quality steel, and some sizes are available, or customize size. This series are made of high quality galvanized steel, which causes the ... product usefulness and steadiness. Category: stud, trackUse: for partition wallMaterial: High quality steel with zincificationSize:Stud: 150x50mm, 100x50mm,75x50mm, 75x40m, 75x30mm or customizeTrack ...