Check out more details on https://www.accessfloorstore.com/homogeneous-vinyl-flooring/non-directional Large base: 2.0 mm Material: polyvinyl resin Gram weight: about 2750 grams/square (gram weight light means the resin is of good quality) Package size: 20m* 2m Additional features: anti-iodine, antibacterial, fire retardant, acid and alkali resistance Applicable places: hospitals, schools, stores, offices, warehouses, passenger stations, etc