Specification Brand : uxcell BulletPoint1 : Hole Diameter (OD) : 25mm/0.98"; Rod Diameter (Inner Dia) : 13mm/0.51"; Free Length: 50mm/1.95" BulletPoint2 : 30mm/1.17" Compressed Length; 824N Load Capacity; 41.2 N/mm Spring Rate; Color: Blue BulletPoint3 : Material: The spring is made of alloy steel 65Mn, which is durable and reusable BulletPoint4 : Application: Used in maintenance and replacement of various equipment, such as stamping , injection , die machinery, printers and etc. BulletPoint5 : How to use: Put the spring into the pre-holes or set it into the outside of the support rod, select the right size as needed; FinishType : Painted GemType : No Gemstone HairType : All ItemName : uxcell Compression Die Spring, 25mm OD 50mm Free Length 65Mn 824N Load Capacity Blue 2pcs ItemPackageDimensions_Height : 0.98 inches ItemPackageDimensions_Length : 4.72 inches ItemPackageDimensions_Width : 3.94 inches ItemPackageQuantity : 2 ItemShape : Rectangular ItemTypeKeyword : compression-springs Manufacturer : uxcell Material : Stainless Steel Material1 : Plastic Material2 : spring steel MetalType : Stainless Steel ModelNumber : a22052000ux0672 NumberOfItems : 10 NumberOfPieces : 10 PartNumber : a20121800ux0118 PinType : Spring ProductDescription : Specification: Product Name: Compression die spring Load Type: Light Load Color: Blue Hole Diameter(Outer Diameter): 25mm/0.98" Rod Diameter(inner Diameter): 13mm/0.51" Free Length: 50mm/1.95" (+/- 2mm) Max compression rate: 40% Material: 65Mn Package Content: 2 x compression die spring The loading grade of die springs in various colors (from lightest load to extra heavy load): yellow, blue, red, green, brown. In addition, because die springs are well suited for high-stress applications, they are also suitable for a variety of other applications as well.