Apologise and Declare: we are very sorry that recently our spring being sold by other sellers now, this have mislead our customers. We statement: about the product SPring,we only sold on Fuyuansheng seller, other sellers are not our FYSETC brand, we will not offer after-sales guarantee if you bought wrong, thanks for your understanding.(Note: The length of it is 20mm which is not suitable for CR10 series products)
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)
Hole Diameter (OD) : 0.31"/ 8mm; Rod Diameter (Inner Dia): 0.16"/ 4mm; Length: 0.8"/ 20mm
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.