With the addition of a tandem adaptor kit the egg stroller can be converted into a tandem stroller. To convert into a tandem you need to purchase a lower tandem seat unit and a pair of tandem adaptors. A perfect solution for growing families or for twins from 6 months old. Note: Stroller chassis and main seat unit sold separately. Seat Liner not included. Details & SpecsProduct name:Egg® Stroller Tandem Seat Regal NavyProduct dimensions:32.874" H × 9.252" W × 18.11" LShipping dimensions:32.874" H × 9.252" W × 18.11" LShipping weight:12.566 lbs.Colour:Regal NavyUPC:5060427624383Appropriate for ages: Baby - 2