... large and heavy filling 4.100% recyclable PP Foam Board Cover Large Post Binders With Handle/PP 3-Layer Eco-Friendly ... Binder/Durable binders:PP 3-Layer Foam Board Features:1. PP 3-layer foam board covers, eco-friendly, non-toxic, high ... intensity, 100% recyclable material2. 25% lighter than general PP board, waterproof, durable3. High heat resistance, excellent chemical resistance, insulation ...