Thirty-six mailbox slots can be used to organize student homework, parent messaging or office work. Shelves include clear plastic nametag holders and are large enough to accommodate standard letter sized paper. Heavy duty design includes corner caster brackets for mobility.KYDZSafe edges. KYDZStrong construction. KYDZTuff finish. MAXBracket. Commitment to Care. GREENGUARD Gold certified. CARB II & CPSIA compliant.. Lifetime warranty. Back options available. See cleaning recommendations at www.jonti-craft.com/cleaning.