Nydhi NS620 (Repulsion) Badminton String Reel (200m)

NS620 string is designed by researchers with over 70 years of experience in badminton string technology, long before any of the major badminton brands existed. It's made of NYDHI proprietary technology inner core and high-quality microfilament outer core. It's designed for excellent repulsion with minimum tension loss.

NYDHI strings were tried by players and below URL has additional reviews:

https://www.badmintoncentral.com/forums/index.php?threads/nydhi-badminton-strings.188847/

Specifications:

Gauge: 0.62mm
Length: 200 Meter (660 Feet)
Color: White
Feeling: Soft Feeling
Tension: Up to 30 lbs. (13.5 kgs)
Made in USA

Features:

Repulsion Power: 5/5
Control: 5/5
Tension Stability: 5/5
Durability: 4.75/5