Shower head with relaxing mineral stones. dimensions: ø7,9x7,5x24,5 cm (diameter/depth/height) includes 3 types of mineral stones (white, gray and red) all with softening and relaxing properties. maintenance: change the balls approximately every 6 months. how to change the stones: unscrew the knob head to access the white ball compartment. for other balls, unscrew the handle from the knob. reference of the spare part: 01839.