The Pro is part of Sterling's Marathon Series. The Pro has been created for climbers who want a super durable rope. There is a thicker sheath compared to other Sterling ropes, providing a greater resistance to abrasion, and thus creating a longer lasting rope. With the diameter of 10.1mm this rope still handles and performs well.

Specification
UIAA Falls: 6
Weight Per Meter: 63g
Sheath Slippage: 0%
Impact Force: 8.6kn
Static Elongation: 8.4%
Dynamic Elongation: 35.3%

The Sterling Pro would be an ideal choice for those looking for good alrounder, being durable enough to be used as a working rope or for top roping, whilst still great to use on the lead and to belay with.

Relevant Review
Sterling Ropes Review (22/10/10)