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I am looking for some ducting tube for the new build laundry chute system, i got about 1000mm height from the first floor slab to ceiling of ground floor and about 600mm off set from first floor to ground floor. please refer to the sketch attached.rnrnI am not sure how much off set to connect the two 45 degree elbow as there is no dimensions on the spec sheet.rnrni assume that 1 length of straight tube and two pieces of 45 degree elbow can achieve what i got on site.rnrnI would like to speak with the technician for further discussion.rnrnThank you.