This product comes in a set of two. It helps with heat dissipation, which can be a problem when using a laptop for extended periods. It's also convenient for adjusting the angle. You can also stick it to the back of your smartphone. It's compatible with all models because it uses strong 3M adhesive stickers to attach to your computer. Available colors are black and silver. Please let me know your preferred color in the comments. Bulk sales are also available.