The dust cover fits perfectly on Kryptonite Evolution Series 4 chain locks. 

You can either print only the dust cover and keep the original slider (it does fit nicely on it) or you can print the dust cover slider. My slider was not broken so I kept it. 

You can optionally print a TPU spacer which makes the slider less likely to fall out of place. Gluing it in place does the job

depending on your printer, you might need a little sandingon the parts so they slide well.

Printed in Prusament ASA Galaxy black, perfect for outdoor use and durability.