Elcoho 4 Pack Black Foam Board 20 x 30 Inch Thick Foam Core Board for Projects, Double-Sided Acid-Free Foam Poster Boards for Graduation DIY, Painting, Displaying, School and Craft Projects

["Value Pack with Protective Corners: this set includes 4 black foam boards, each with a robust 5mm thickness for added durability; 4 thickened white plastic protective corners (20mm inner diameter) are included to keep boards safe from damage during transport and storage","Quality Material & Design: each board features a double-sided black cardstock exterior surrounding a dense foam core； constructed from responsible materials, these boards are odorless and safe for use in any setting","Accurate Dimensions with Flexible Tolerance: these foam boards are designed in standard 20 x 30 inch size, with a thickness of 5mm; due to the foam's elasticity and cutting technique, a slight size variation of ±0.35 to 0.55 inches may be present, making a precise fit for most framing and display applications","Ideal for Diverse Creative Projects: suitable for graduation DIY crafts, school assignments, painting, model making, signage, presentations, and display backgrounds; allows freedom for users to utilize boards in a variety of imaginative ways","Customizable and Sturdy Design: the double-sided black cardstock surface makes the board stiffer and more resilient than standard options; easily cut to any required size or shape with basic tools, providing excellent support for displaying photos, artwork, or other projects"]