Because Only for compression springs, there are thousands of sizes. 0.011"x0.16"x0.39", 0.011"x0.16"x0.59", 0.011"x0.16"x0.79", 0.011"x0.16"x0.99", 0.011"x0.16"x1.18", 0.016"x0.2"x0.39", 0.016"x0.2"x0.59", 0.016"x0.2"x0.79", 0.016"x0.2"x0.99", 0.016"x0.2"x1.19", 0.02"x0.24"x0.39", 0.02"x0.24"x0.59", 0.02"x0.24"x0.79", 0.02"x0.24"x0.99", 0.02"x0.24"x1.19".
eBay