Lenovo Thinkpad T450s Business Laptop, Intel Core i5-5th Gen. CPU, 8GB RAM, 256GB SSD, 14 inch Touchscreen, Windows 10 Pro
Lenovo ThinkPad T450s 14 Inch Business Laptop, Intel Core i5-5300U up to 2.9GHz, 8G DDR3L, 120G SSD, VGA, Mini DP, Win 10 Pro 64 Bit Multi-Language Support English/French/Spanish(Used) - Walmart.com
Lenovo Thinkpad T450s Laptop i5 2.3GHz 12GB 512GB SSD Windows 10 pro 14" laptop | eBay
Amazon.com: Lenovo ThinkPad T450s - 14 Inch - Intel i5-5300U 2.30GHz - 8 GB RAM - 256 GB SSD - Windows 7 Pro - 20BX001AUS : Electronics
Lenovo ThinkPad T450s 14" Laptop i5 5th Gen 250GB SSD 4GB RAM Win 10 Pro (CI) | eBay
Upgrading a ThinkPad T450s with an M.2 SSD - James Ridgway
Looks like m.2 2280 worked out just fine for t450s : r/thinkpad
thinkpad-t450-ssd-M2-2242 - English Community - LENOVO COMUNIDAD