The (4 Pack) Furnace Mounting Blocks DIVERSITECH Model - FB-1 HVAC is a set of four mounting blocks specifically designed for central furnaces. Made by the brand Diversitech, these blocks are used to securely mount a furnace in place for optimal heating efficiency. The design of these blocks ensures stability and support for the furnace, helping to improve the overall performance of the heating system. Perfect for home improvement projects involving heating and cooling systems, these furnace mounting blocks are a reliable and essential component for any central heating setup.