Die Spring: compatible with most 3D Printer Bed, great Ender 3/2 heat bed springs, flat top and stiffer;
Rectangular Section, strong, keeps print bed level better.
Hole Diameter (OD) : 0.31"/ 8mm; Rod Diameter (Inner Dia): 0.16"/ 4mm
Length: 0.8"/ 20mm
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.