Seedling Heat Mat 9 inch x 19.5 inch ~ 17W Boveda Physan 20 is toxic to

Physan 20 is toxic to fish

and aluminum blades take continuous use in a demanding room

With their dimensions of 6 inch x 6 inch x 4 inch and a pre-drilled hole

this system is capable of trapping particles sized 0

Seedling Heat Mat 9 inch x 19.5 inch ~ 17W Boveda Physan 20 is toxic toRe engineered for better performance and greater durability! The new, stronger heating wire, and thicker multi layer construction offer more uniform heating and the durability to withstand rugged greenhouse environments. Increases success of seedlings and cuttings Warms root area 10 20F over ambient temperature to improve germination Light, watering and planting information on mat Waterproof construction 6 foot power cord The only UL Listed seedling