StarTech.com Thunderbolt 3 PCIe Expansion Chassis with DisplayPort - PCIe x16 - Thunderbolt 3 PCIe Enclosure - Thunderbolt 3 PCIe Box - Add an external PCI Express 3.0 x16 slot and a 4K DisplayPort connection to your Thunderbolt 3 MacBook or laptop

Supports one 4K DisplayPort monitor, and a second extended monitor display through the Thunderbolt 3 (USB-C) port Provides a x16 4 lane PCIe 3.0 slot or interface Works on Mac and Windows computers Durable aluminum construction Daisy chain up to six Thunderbolt 3 devices TAA Compliant Increased productivity with Thunderbolt 3 and up to 40Gbps bandwidth - twice the speed of Thunderbolt 2 (20Gbps) and eight times faster than USB 3.0 (5Gbps) Supports half-length and dual-slot PCIe card standards at all heights, with standard profile slot brackets Supports 5K Thunderbolt displays Internal 60 mm cooling fan