You are bidding on a 50 pound , 3.5 gallon pail of fresh super duty mortar.  It is a sodium silicate bonded alumina mortar good to 3200 degree F applications.  This mortar may be diluted with water up to 30% by weight for "dipping-grade" or light bonding brick joints.  The primary application for this mortar is for bonding Insulating and fireclay refractory bricks.  It is an air setting mortar.  Shipping will be based on your zipcode and weight of this container.