Product Details Shipping & Returns Product Details Samsung NP520U4C Laptop Keyboard Keys Replacement This Samsung NP520U4C Keyboard key is 100% OEM and Offers Perfect Fit & Finish. On this model, all the keys are BACKLIT, please take a second to make sure your model matches our picture below. This is the layout of the keyboard What comes with each laptop key kit. 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 your press it. Shipping & Returns