Product Details Reviews Shipping & Returns Product Details Acer Aspire ONE 521 Replacement laptop keyboard keys WHAT COMES WITH EACH KEY ORDER The Key Cap This is the piece of plastic that has the letter on it. The Retainer Clip The plastic or metal sisscor clip pieces that hold the key cap to the base of the keyboard. The Rubber Cup This is the piece of rubber or plastic that acts as the spring to rebound the key after you press it. Please make sure your retainer clips look the same as below, there may be other version we only have this version in stock. AC29 Your Keyboard Should look like this. Reviews 1 Review Hide Reviews Show Reviews –> Laptop key 5 Posted by Sean on 28th Jul 2020 Key fits perfectly!