Hauck Pram Unit for Duett III Are you expecting twins and would like to use the Duett 3 from their birth? We have the solution. The double buggy converts into a twin buggy for newborns in the blink of an eye, with the separately available Duett 3 infant carrier. Flexible from the very beginning. Convert the top seat of your Duett 3 into a pram and use it for your newborn. Remove the bottom seat and mount the second pram onto its attachments. You can now take both of your children out in the Duett 3 from birth. The major benefit is that both babies are not side by side, but one above the other. You\'re guarantee to fit through every door or in every elevator. Features: Additional Pram / Pushchair seat for Duett 3 Converts Duett 3 into a twin buggy for newborns Simple to attach and remove from your pushchair