Tandem pushchair twin pram recommended minimum age new born pushchair weight 115 kg reversible seat harness system 5 point safety harness slider adjustable folding mechanism collapsible special feature upholstered seat wheel settings swivelling lockable wheel type solid rubber tyres number of wheels 4 footrest adjustable dimensions 132 x 56 x 101 cm dimensions folded 43 x 60 x 90 cm colour beige included in delivery canopy footmuff shopping bag