Features: 1. PREMIUM MATERIAL: Made of multiple layers of flexible PVC that encase heat-conducting film, the outer layer is sealed to protect the internal heating elements. It is wear-resistant and durable to use. A must for starting seeds in Spring. 2. UNIFORM & STABLE HEATING: The heat-conducting wires are evenly distributed in the heating pad so that the plant seeds can be heated evenly. Provides constant temperature to improve vegetable, plant, herb, and flower seed growth. 3. SAFE & EASY TO USE: The seed grow mat is designed with waterproof, the surface is easy to clean that enables safe scrubbing. Just place the heating pad flat under the seedling starter trays, then insert the plug into the socket, and turn on the power to start heating. 4. CONVENIENT STORAGE: This heating mat is light and compact, you can roll it up and pack it in a bag when you dont need it. No matter where it is stored, it will not take up much space. 5. VARIETY OF USES: Perfect for heating plant seeds or seedlings, greenhouse, grow box, home-brewing, and pet enclosures terrariums, such as those used for reptiles, rodents, and arachnids. Especially if you live in colder places. Specification: Material: Surface: PVC Rubber Sheet, High Temperature Resistant And Anti Corrosion, Heating Wire: Silicone Wire Heating Wire + Acupuncture Cotton Product Color: Black Product Size: S: 10x52.5cm, M: 25x52.5cm, L: 50x52cm Product Weight: 164g, 317g, 550g Plug Optional: US 110V, EU 220V, UK 220V, AU 220V Package Included: 1 x Seedling Heat Mat