<https://vilros.com/products/uctronics-aluminum-alloy-heatsink-armor-case-with-dual-cooling-fan-for-raspberry-pi-4#Product>
<http://schema.org/description>
"Item Description\nThis is Raspberry Pi 4 armor case with dual cooling fan, aluminum alloy metal case specially designed for the Raspberry Pi 4 Model B.\nFeatures\n\nSpecially designed for the Raspberry Pi 4---Cut-outs for every port of Pi 4 board, easy to access to all ports.\nDual cooling fan---Dual cooling experience with quiet sound and powerful heat dissipation, you don't need to worry about the overheating problems and the noise.\nAluminum alloy case---High quality aluminum material improves efficient heat dissipation, tough and durable, build a strong protective shell for your raspberry pi 4b model.\nHeatsink pillars---Built-in heatsink pillars to dissipate heat faster and more efficient.\nOpen case and stripes design---Open case and stripes design with attractive appearance, will not affect WIFI signal.\nNote: Raspberry Pi is NOT Included.\n\nProduct information\nDual Fan:\n\nLow energy consumption design.\nDual cooling experience with powerful heat dissipation, no more overheating problem.\nVery quiet cooling fan, you will not be bothered by the noise.\nUpdate thermal tapes can make sure good heat conduction effect.\n\nAluminum alloy case and Heatsink:\n\nPerfect size for Raspberry Pi 4B(87*56*25mm).\nThe high-quality CNC aluminum alloy case can protect your Pi Safe.\nOpen design can make sure our CNC case will not affect WIFI Signal.\nAluminum alloy case open design in the surface, perfectly supplying efficient cooling for the Raspberry Pi 4.\n\nPackage Including\n1 x Raspberry Pi 4 Armor Case with dual fan1 x Screws Pack（12 screws）3 x Cooling Sticker1 x Wrench\nProduct information\nColor:Metal Case with Dual Cooling FanPackage Dimensions    3.94 x 2.76 x 1.18 inchesItem Weight    4.3 ounces"
<https://vilros.com/collections/raspberry-pi-fans>