Seed Starting Heat Mat for Seedlings Size (inches):20x20 The LED Strip Light features

The LED Strip Light features 6400K Cool White spectrum

It ships free to the lower 48 states and is NRCS Preferred

They feature a 3/4" opening and side openings to improve airflow

For the 2 3/8" version

Seed Starting Heat Mat for Seedlings Size (inches):20x20 The LED Strip Light featuresSeed Starting Heat Mat for Seedlings helps germinate seedlings faster by warming the root zone 1020F above ambient. Its patented double layer design provides reliable warmth while remaining waterproof and easy to clean, supporting seed germination, plant cuttings, and early root growth. The mat includes a UL listed 6 foot power cord for safe, ready to use operation. Use the mat continuously (24 hours a day) to maintain soil temperatures ideal for