Cheap And Discounts 10PCS Extruder Pressure Springs MK2B MK3 MK2A 5*8*0.8mm Hot Bed Heating Platform Adjusting Spring 3D Printer Parts Wholesale. Buy Directly From Merchant Baiozraw Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.