Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: will this work with handle having internal diameter 18 mm
Document: Despite the description, these are black with silver alloy levers as pictured. Installation was easy, and the brake levers work great. I've read online that these are the original equipment for the Cane Creek 200tt, but can't confirm it. Either way, I'm extremely satisfied with these!
ordered these for a single speed I was building with aero bars, The fit great and were easy to connect to the brake cables. They do not have interior cable routing which was fine for this application.
They do not seem to easily fit into my Fyxation Bullhorn Pursuit Bars. Inexpensive Projekt Fixie Bullhorn in the mail. Hoping they slide right in. Other than that seem like good quality for the cost. Trying to keep cost down getting this Fyxation Eastside customized to my liking. So, sadly, not the inexpensive it started life as. The single speed is now a 2 speed, ala Sturmey Archer S 2 kick back hub. The only really bad thing about bike is extremely cheap headset.
Safety first.
Chopped and flopped an extra set of drop bars into bullhorns. I tried just using my aero brake levers but it was awkward and these are affordable and look much cleaner on bullhorns. Love that they are adjustable for fitting into the end of the bars, very simple construction and they provide great feedback when braking. Would buy again.
Answer: no