9H Hardness Temper Glass Screen Protector For Apple iPad Mini 2/3/4 & Retina Display Toughened glass has high transparency, and the color never changes Surrounding part is smooth to protect the screen from being smashed Product is environmentally friendly and pollution-free Ultra-thin glass can be treated by toughening under high temperature of 420 Compatible with: Apple iPad Mini 4, iPad Mini 3, iPad Mini 2.