... kg/m3, 3 Hardness from 7-70 units, variety. 4 Used: Car, mattress,sofa,bed,chair... Name: SpongeType: Ordinary sponge, high resilience ... : Customized, 7-70 unitsColor: CustomizedMaterials: Polyurethane, Polyether polyols, etc.Appliance: Car, mattress,sofa,bed,chair,cushion,pack... SPONGE USD FOR SOFA ...