uxcell Laptop Notebook Cool Ball Cooler Stand w/Skidproof Pad Mini Notebook Cool Ball can efficiently decrease the overall temperature by creating a cooling gap underneath your laptop Smooth surface reduce friction while moving your notebook This Laptop Pad is easy mounting and dismounting; Raises laptop for a better typing and viewing angle Laptop Cooler Stand is a perfect accessory for your notebbook Dimension (Each One): ~3.8(D) x 2.2(H)cm