These fit reverse into aero bars and use barrel ended brake cable inners. The option of Brown / Silver alloy or all Black

Dia-Compe 188 Reverse Pull levers. 
A firm favourite for Time Trials. 
Speciality levers that hinge on the outside and have a cable feed that runs inside the handlebar tape. 
Fits inside the end of the handlebars using an expanding plug fixing. 
18mm with sleeve for 20mm handlebar ID. 
140g pr. 
All Black or Brown with silver lever blades.