The Shieldmaster 45 Degree Elbow can be used as a pair to offset your flue run or to divert you through a wall, round a gutter or to avoid beams..
Shieldmaster does not need any additional silicone or sealants to seal the joints. It has a unique push-fit locking system to make connecting and disconnecting really simple.
Please note - as with all twin wall parts the diameter quoted is the internal diameter - the external diameter is 2 inches larger due to the surrounding insulation.