Material : Natural Rubber Base Polymer Surface Finish :High Ribbed pattern providing safe working with 3 Phase 415V Dimension : 1) 9.5mm thick x 900mm x 1000mm 2) 9.5mm thick x 900mm x 2000mm 3) 9.5mm thick x 1200mm x 1000mm 4) 9.5mm thick x 1200mm x 2000mm Dielectric Strength:5 Kv Electrical Breakdown Strength:11 Kv Confirms to BS921 : 1976