Check the listing for details. Vivosun Seedling Heat Indoor Plants Germination Mat, 10"x 20.75". Condition: New. Listed at 19.99 USD. BRAND NEW Vivosun Seedling Heat Indoor Plants Germination Mat, 10"x 20.75 PLACK OF 1 Reliable Results: The heat mat maintains sweet-spot temperatures around 68-86(20-30), which is perfect for starting seeding and cutting propagation; Made of high-quality PVC material, it is wear-resistant and durable to use Stable & Uniform Heat: The advanced far-infrared heating technology of this heat pad provides your plant with a warm environment to create optimal conditions for speeding up germination and accelerating the growth rate; The strengthened heating film with double insulation layers ensures this durable mat will not scorch the root and can produce plenty of invigorating dew when being used in combination with a humidity dome Built to Last: Designed with soft, flexible, and ultra-lasting material, this warming mat goes beyond stringent MET standards; The IP67 rating waterproof surface is easy to clean that enables safe scrubbing; Note: please only use the product indoors and do not immerse it in the water; Equipped with a carrying bag in the package, you can simply roll it up and pack it away, which is handy to move to different places; This product does not specify any expiration date