<p>Splints feature punch-out holes for tie downs Micro Perf edges protect paper cuts on cardboard 4 sizes: 12"x9", 18"x 9", 24"x14", 34"x19".  4 styles: 3 strips of ½" thick foam (each side & center); full foam 3/8"; center strip 3/8" foam; and plain (no foam) 24" and 34" lengths offer an extra center crease for firm support of thin limbs.</p>