Gray or Grey Replacement Silicone Skin for Iphone 4, 4S OtterBox Defender. This is NOT an OtterBox brand item! 30 day warranty card included from Mobile Supply Replacement Silicone Skin compatible and comparable to OtterBox Defender Great replacement for your current skin with a 30 day warranty are included with any purchase with Authorization card from Mobile Supply and it's affiliates A very cost effective replacement for your current model 100% silicone skin that is thick and durable. This is NOT an OtterBox Brand skin, nor is this an actual case! This is simply a replacement for your current outer layer A Mobile Supply Warranty Card with Authenticity number is included with each purchase. Only purchase from authorized dealers