As standard we offer two types of screens. Stevenson Screen, small. Material: Larch wood. Impregnated, painted white. Dimensions: H x W x D = 620 mm x 410 mm x 410 mm. Option: optimal fitting ventilation unit. For mounitng of air humidity sensor, air temperature sensor, dew-point sensor, etc. Stevenson Screen, large. Pedestals for the screens in various designs.