The MEPA SF rectangular mounting frame is a universal installation system for wall mounting, designed for extra-flat and super-flat rectangular steel shower trays as well as for mineral cast and acrylic shower trays with smooth undersides. This frame features flexible, removable components and easy adjustability, allowing all installation steps to be conveniently carried out from above to ensure a professional and stable setup. It is compatible with extension sets for ultra-deep and extra-high configurations and supports installation heights ranging from 55 mm to 230 mm. The frame fits shower tray dimensions from 70 cm x 70 cm to 120 cm x 120 cm, with an adjustable height of 125 mm and a mounting height range of 65 mm to 190 mm. The frame dimensions correspond to the size range of the shower tray for a precise fit. Built for durability and reliability, this mounting frame allows for efficient and secure installation in private bathrooms and meets high-quality standards. When used with mineral cast or acrylic shower trays, specific instructions should be followed to ensure optimal performance.