Britax Infant Positioning Insert (Prior Model)
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<div style="text-align:left"><b>[Product Information]</b></br><ul><li class="showHiddenFeatureBullets"><span class="a-list-item">
                    May be necessary for small infants to achieve a snug fit of the harness around your child
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                    Sled tested and certified for use with the following britax convertible car seats: roundabout 55, marathon 70, boulevard 70, boulevard 70 cs, advocate 70 cs
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                    For use with infants weighing between 5 and 11 lbs
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<img src='http://ecx.images-amazon.com/images/I/51n4B0ESf2L.jpg'></br>