Special steel strip, Spring steel strips, 0.1 mm carbon, 0.1 mm shim steel strips.
"Discover Harper Steel Strips precision-engineered special and spring steel strips, including 0.1 mm carbon and shim steel options, tailored for diverse industrial applications."
https://www.harpersteelstrips.....com/about-harper-ste

Heat treated steel strips.
"Harper Steel Strips specializes in customized hardened and tempered high-carbon and stainless steel strips, ensuring exceptional flatness, tensile strength, and fatigue endurance."
https://www.harpersteelstrips.....com/about-harper-ste

0.1 mm C95 / C98 / AISI1095 / SK4 / CS100 / C100 steel strip
"High-quality 0.1 mm C95, C98, AISI 1095, SK4, CS100, and C100 steel strips, ideal for springs, blades, and precision components."
https://www.harpersteelstrips.....com/c98-hardened-tem

C80 shim steel
"C80 shim steel from Harper Steel Strips offers high-carbon precision, ideal for applications requiring durability and resilience."
https://www.harpersteelstrips.....com/c80-c62-c55-grad

Hardened and tempered steel strips, printing doctor blade steel / strips.
"High-quality hardened and tempered steel strips, including specialized printing doctor blade steel, tailored for precision and durability in industrial applications."
https://www.harpersteelstrips.....com/hardened-tempere