1. Disc spring as per DIN2093 and GB/T1972-2005 2. Alloyed steel and stainless steel by using material 50CrV4, 60Si2MnA, SUS304, SUS301, SUS306 and etc. 3. Surface treatment: Phosphating, electrophoresis, oxidize bluing, mechanical Zinc plating 4. Annual out put: 40, 000, 000PC/year 5. Place of Origin: Yangzhou, China 6. Brand: Sunzo or OEM 7. Delivery time: 10 days 8. "K" disc spring"for ball bearings 9. We can customize disc spring as per customer's requirements. 10. The characteristic of disc spring is maximum Force in minimum surface Specifications: 1. OD: 6.00mm - 600.00 Mm 2. Thickness: 0.10mm - 37.00mm. Package: standard wood box or carton +case.