One of the most vital accessories for mobile device protection is tempered glass. As a mobile tempered glass wholesaler or a retailer, it is essential to have a deep understanding of the available options in the market. Two popular choices that often come up are 11D and 18D tempered glass.here we’ll explore the Differences Between 11D and 18D Tempered Glass. Tempered Wala - Mobile Tempered Glass Wholesaler.