ITEM NAME:200PVH 20 Sizes Springs Practical Metal Tension/Compresion Springs Assortment-OZ.Compresion Spring Flexible springs are both sturdy and springy for the right amount of tension. Tension spring Material: Spring steel. Color: Silver. 1X 200PCS Spring Set. 9.52 19.05mm/12PCS. 9.52 15.8mm/6PCS.