Safety sign, danger confined space enter by permit only, adhesive vinyl, 7 x 10 features: signs identify and indicate potential, type, and degree of hazards that may lead to accidental injury or property damage. comply in accordance with osha 29 cfr 1910.145 and ansi z535 requirements printed matte surface has permanent acrylic adhesive back flexible vinyl can be applied to curved or uneven surfaces moisture resistant for a various light-duty indoor and sheltered outdoor marking needs square corners and scored back liner for quick peel-off and application