The heat of the mat is harmless for plants and suitable to accelerate germination and rooting of plants. It is safe to use the waterproof heat mat and it can provide consistent and uniform heat. Made of high quality PVC, it is durable. The heat mat is 20inch in length, 20 inch in width. It is suitable for greenhouse, flowers, fruits and vegetables. Item Name: Heating Pad Material:PVC Supply Voltage: UL 120V, GS 230V, BS 240V Plug Type: US Plug, EU Plug, UK Plug Power: 45W Size:50.8cmx50.8cmx1cm/20inx20inx0.39in Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 X Heating Pad 1 X Adapter