These Basic Elements Crimp Tubes from The Beadsmith are essential for all kinds of jewelry projects. 

Finish: Copper Plated.

Measurements: 

1.3mm - 0.80mm inner diameter.
1.8mm - 1.30mm inner diameter.
2.0mm - 1.5mm inner diameter.
2.5mm - 2.0mm inner diameter.

Quantity: Approximately 600 pieces (150 pieces of each size.)