dumos twin inflatable blow up air mattress, 18" double height airbed, built-in high capacity pump, non-slip bottom, 660 lbs weight capacity, ideal for home or camping simple black 18in-twin is up for auction in Sports & Outdoors. The current bid is $3.50, 90% below the $35.98 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.