3D Composite Drainage HDPE Geonet High Tensile Road Railway Tunnel Drainage. Strong Drainage Performance: Equivalent to one meter thick gravel drainage with excellent flow capacity. High Tensile Strength: Withstands compressive loads up to 3000KPa for long-term stability. Corrosion and Chemical Resistance: Resistant to acid, alkali, and corrosion ensuring long service life. Customizable Dimensions: Length and width can be adjusted according to specific client requirements. ISO Certified Quality: Certified by ISO9001, ISO14001, OHSAS18001, CE, SGS, and TUV. Free Sample Availability: Free samples provided for evaluation prior to order confirmation. Fast Delivery Time: General delivery within 5-10 days after receiving deposit payment. OEM and ODM Services: Professional manufacturer offering full customization and design support.