Cheap And Discounts 4pcs Official Plated Copper CR10 Heated Block Aluminum Brass Heat Block All Metal Hotend 3D Printer Parts For Ender 3 CR10S Wholesale. Buy Directly From Merchant CNCFEP 3D PRINTING Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.