3M-Matic™ Adjustable Stainless Steel Case Sealer a20-s is a bottom belt adjustable case sealer with 3M™ AccuGlide™ 2+ SSTL Taping Heads for low-impact sealing to protect cases from damage. We make this case sealer of 99% stainless steel to resist corrosion, with a reliable motor drive for dependable box-after-box results.