About this item 1.Easy to install: Projector laptop tray Holder is used to fix laptops and projectors on a tripod or floor stand. The non-slip sponge can fix the equipment, and we also provide you with an elastic band. 2.Dimensions: 24 x 34 x 3 cm 3.Quality material: This tray Holder is made of cold-rolled stainless steel,stronger and more durable than aluminum alloy. Non-slip sponge and belt, easy to operate.