... /Unistrut Channel/C-channel /Strut Framing with features :C and U shape strut channel with plain or slotted A)Size:41mm*21mm ... (3m,5.8m,6m ),special length are available upon requestD)Holes:9*35mm,11*35mm,14*30mm etcE)Material :Carbon steelF ... Labor ,light and cheap ,High Mechanical Strength Steel Strut Channel With Holes