This was made as a small test of my design abilites and as for emergency use only. Plastic should not be used to replace any metal part on a vehicle. However i have printed this in petg-cf and it works fine albeit more flexible than the original metal part and producing less braking force. if you decide to use this on a bike then it should be printed in the strongest plastic you have, ideally abs or stronger. Warning this should not be used as a permanent replacement for the metal lever.