The videos below show a step by step process on how to change the light bulbs in our most popular couplers. The replacement bulb item number will be listed as well.

If you are unsure if you are able to change the bulb on your own click here and you can submit a repair request form that will be sent to our Handpiece Specialists.


NL10Ti: https://www.youtube.com/watch?v=kWmK04PZwo0

Replacement Coupler: 5021281U0

Replacement Bulbs: 5010051U0


NL10-LED: https://www.youtube.com/watch?v=fIFmZb6kYmI&t=17s

Replacement Coupler: 5021283U0

Replacement Bulbs: 5019200U0 - Not currently available online


NK-LED: https://www.youtube.com/watch?v=cie3ehS7Ol8

Replacement Coupler: 5021284U0 - Not currently available online

Replacement Bulbs: 5019200U0 - Not currently available online

Replacement O-rings: 5015061U0 - Not currently available online


Coupler gasket replacement: https://www.youtube.com/watch?v=YA8CSMukNmg

4 Hole: 5011053U0 / 5 Hole: 5011695U0 / 6 Hole: 5011695U0


If you have any questions or concerns please contact our Handpiece Specialists at 1-800-841-4522 x4676 or by email to [email protected].