Die Spring: compatible with most 3D Printer Bed, great Ender 3/2 TronXY X5S heat bed springs, flat top and stiffer;(Note: The length of it is 20mm which is not suitable for CR10 series products)
Rectangular Section, strong, keeps print bed level better.
After Sales Guarantee: each one desfective item can have the free replace or refund, need more help please feel free to email or QA us, we will try our best to service you.