Important size: 1Length:150mm 2Mount Dia:19 3ID:10mm 4Marterial:40Cr 5Hardness:45-50HRC Application: Professional in Producing the lawn mower blade.We could design all kinds of cutter blades according to our customer's paper and samples.Through more than 10 years of development,the company has accumlates rich exprie-rice of designing and fabricating gardening toolhas trei-ned a group of experienced technicians,managers,and a team of talented staff members.For the more datails,please click.Thank you.