- You cannot add "Lenovo 15.6" ThinkBook 15 G2 Intel Core i5 - 1135G7 (up to 4.20 GHz 8mb Cache) - 11th Generation - 4GB DDR4 RAM - 256GB SSD - 15.6" FHD Screen - DOS - Mineral Gray 1 Year Internation Warranty" to the cart because the product is out of stock.