... 4-Wide usage:ad, boxes,septum Features:Material: polypropylene ppGood quality at a more favorable priceWater/grease-proof, fire retardantVarious application ... board, show board, brand mark, light box board, sign board, warning signs etc. 4) Industry Use: protecting board, padding board, luggage ... tailor kinds of products to meet clients’ needs. 2-12mm High Quality Corrugated PP Hollow Plastic Sheet