Abstract: In the continuous casting of metal in strip form between moving belts while maintaining a flowing layer of liquid coolant between the reverse surface of a belt and mutually adjacent, guiding-surface, nozzle elements that deliver such coolant, such elements are each constituted as a cooling and guiding unit having a hexagonal face and including releasable retaining elements normally holding such face (through which coolant is projected against the belt) at desired level under spring pressure against the engaged elements. The elements, respectively with the hexagonal head and with a fixed support, are disengaged by depressing the head and turning it, thus allowing removal of the device for replacement or service. As the hexagonal heads can be arranged very closely together, except for narrow, liquid-withdrawal spaces between adjacent edges, practically complete support for a coolant layer across and along the entirety of the belt, is attainable, yet with practicality of construction of the units.