5 layers PE flexibag 1.16,000-24,000 liters capacity 2.4 layers PE+1 layer PP 3. 2 or 3 inch valve 4. EC,FDA,KORSHER,COA 5 layers PE flexibag Hengxin FlexitankFlexitank TypeTop Loading &DischargingBottom Loading &DischargingTop loading & Bottom DischargingFlexitank CertificateFDAECSGSKOSHERCOAISOHACCPFlexitank Component4 inner layers food grade PE film 1 outer layer Strong PP woven fabric 3inch ...