Compression Spring, 316 Stainless Steel, Inch, 0.85" OD, 0.081" Wire Size, 0.573" Compressed Length, 1" Free Length, 16.91 lbs Load Capacity, 39.6 lbs/in Spring Rate (Pack of 10) Slightly magnetic stainless steel 316 wire per ASTM A313 (chemical and physical only) Spring ends are closed and ground flat (squared) for efficient force transfer and reduced possibility of tangling Load capacity of 16.91 pounds Maximum operating temperature of 570 degrees F (300 degrees C) Plain wire finish passivated per ASTM A967 for excellent resistance to corrosion and oxidation