Tandem pushchair recommended minimum age new born reversible seat frame material aluminium carrycots pushchair seat second seat backrest 3 positions brakes locking brake canopy with sun protection removable harness system 5 point safety harness slider adjustable handlebar height 103 cm series hauck duett wheel settings swivelling lockable removable wheel diameter rear 24 cm wheel diameter front 17 cm number of wheels 4 safety bars removable