sibe-r plastic supply pvc closed cell expanded plastic sheet 1/4" x 24" x 48" - black sibe-r-plastic supply sibe-r plastic supply intra is a lightweight yet rigid board of moderately expanded closed-cell polyvinyl chloride (pvc) extruded in a homogenous sheet with a low gloss matte finish. half the weight of solid pvc, may be sawed, drilled, bent, stapled, nailed, riveted, glued, fabricated, edge finished and thermoformed using ordinary tools. forming may be done on conventional forming machines. widely used for: display boards signage and exhibits photo mounting wood replacement shelves and fixtures prototypes cosplay costumes