This brass shaft sleeve adapts a 16 mm bore pulley with 5 mm key way to our 15 mm servo motor shaft with 5 mm key way.

Photo 2 shows what comes in the box: Just one adapter, and one key way.
All other photos are for reference only.

Specifically designed to fit our strait shaft 2 HP servo motors to 16 mm shaft drives and pulleys.
 
Part’s specification:
 
Sleeve inside diameter 15 mm
Sleeve outside diameter 16 mm
 
Sleeve length is about 42 mm +/- 2 mm
Sleeve Key way slot 5 mm
The key way is 5 X 5 mm square.

Key way length is apx 32 mm 
These are hand made and will require patience to hand fit.
They fit tight and run true