Signum Pro · Polyester
Signum Pro Plasma HEXtreme
Hexagonal co-polyester monofilament
Price per set$10–13USD, typical retail
Gauges16L, 17, 18Orange
Stiffnessmedium highPolyester
Junior minimum age13+intermediate, advanced, elite
Performance ratings
Power
6
Spin
9
Control
8
Comfort
5
Durability
7
Tension hold
8
Overview
Signum Pro Plasma HEXtreme was one of the first hexagonal shaped strings on the market, pioneering the shaped poly category that has become so popular. The six edges provide excellent ball bite for spin generation while maintaining the tension stability Signum Pro is known for. Built on the proven Plasma foundation with enhanced spin potential, HEXtreme offers German engineering in a modern spin-focused design.
Best for
- Maximum spin seekers
- Heavy topspin baseliners
- Players with western grips
- Those wanting pioneering shaped poly
Not ideal for
- Arm-sensitive players
- Flat hitters
- Those seeking soft feel
Pros
- Pioneer of hexagonal shaped polys
- Excellent spin from 6 edges
- Good tension maintenance
- German quality engineering
- Distinctive orange color
Cons
- Not arm-friendly
- Firm feel
- Less durable than round polys
Stringer notes
Hexagonal shape - string carefully. One of first shaped polys on market.
Break-in period
1-2 hours for full spin potential.
When to replace
Every 12-18 hours or when edges wear smooth.
Hybrid setup ideas
- Natural gut mains with HEXtreme crosses
- Wilson NXT crosses for comfort
Used by
Various club and collegiate players
Specifications
- Type
- Polyester
- Construction
- Hexagonal co-polyester monofilament
- Gauges
- 16L, 17, 18
- Colors
- Orange
- Set price
- $10–$13
- Reel price
- $120–$145
- Brand
- Signum Pro (Germany)
Sources & reviews
Data verified January 2025. Something wrong? Send a correction.
- Specs: Signum Pro Official
- Pricing: Tennis Depot