... bag, cement sacks Product name: Pasted bottom sack with valve (cement bag, concrete sack etc)1.Paper type (gsm/m2):80-105 ... , floor leveling compound, colored crack-filling material, plant food, animal feed, fertilizer, seed, sand, chemical material, base grey, refractory, zirconium silicate ... quarantine authorities for testing them and issuing the certificates. industiral sack, cement paper bag