... surface treatment: hot dipped galvanized Quality:CE certificate top cross rail of ceiling suspensionsurface treatment: hot dipped galvanizedQuality: ... ceiling system , including drywall stud & track, ceiling main & cross tee, wall angle, main-channel, furring channel, Accessories etc ... series products main supply to Australia, New Zealand.Top Cross Rail 25*21Furring channel 28*38, 16*38Furring channel ...