Name: Stepper Motor Driver FilterFilter Size:40*30mmDupont Line Length:115mmAs we all know, there will result subharmonic oscillation during printing by usingdifferent stepper drivers, such as A4988 DRV8825 Stepper Motor Driver.So ,here is a device to fix this problem, eliminate vibration stripes effectively .We are committed to customer satisfaction 100%. any inquiry or questions please feel free to contact us.We respond to all emails within 24 hours.