Seedling heat mats are made up of multiple layers of high quality; durable; water resistant plastic material with insulated heating coils embedded inside.
- When plugged in to a wall outlet; the inner coils heat up to raise the temperature of anything touching the mat to between 10°f to 20°f beyond room temperature.
- You can set your seedling trays on top; uncovered; or add a propagation dome to keep soil temperatures more consistent.
- Super easy to use – just plug it in and let the mat heat up to its fixed temperature.
- 21w 120volt size: - 10 x 20. 75in.