Gear Library
Image: Holabird Sports (authorised retailer)
Image: Holabird Sports (authorised retailer)Stringperformance tier
Kirschbaum Pro Line II
Polyester · 1.20 mm/1.25 mm/1.30 mm · Firm · 20–25 kg
polyester · 1.20 mm / 1.25 mm / 1.30 mm · firm
No verified live priceSource: Kirschbaum (official strings page)
Who it is for
Advancing and competitive players looking for polyester with a firm response.
Why it works
Kirschbaum Pro Line II is a co-polyester string in 1.20 mm and 1.25 mm and 1.30 mm; the round profile gives it a predictable, even string bed.
Watch-outs
Polyester loses tension quickly and is harsh on sensitive arms — restring regularly and drop tension rather than pushing it.
Strengths
- Firm, controlled response
- Predictable string bed
Trade-offs
- Tension drops with use
- Gauge changes feel; try one step either way
Compatible player profiles
- Advanced swing speeds
- Competitive swing speeds
- Control-first hitters
- String breakers
Same family, different variant
Sibling versions differ in size, weight or surface — check the exact one on your gear.


