Home > Products > Growers > Grower Equipment > Greenhouse Heaters > PHT REDI HEAT HEAVY DUTY PROPAGATION MAT 21IN X 6 PHT REDI HEAT HEAVY DUTY PROPAGATION MAT 21IN X 6 Log in to see availability and pricing. Item Number: PHT8606 Case Qty: 1 Min Qty: 1 UPC: Manufacturer: Phytotronics Inc. Product Description Product Availability Phytotronics® Redi-Heat™ Heavy-Duty Propagation Mats21in x 6ftRedi-Heat™ Heavy-Duty Propagation Mats are constructed from thick, flexible, rubberized PVC in Phyto Blue color. These mats provide even, constant heat to bottom of flats and pots for superior germination. RDT-4 Thermostat is required for use. Log in for warehouse specific availability.