Modify S90+ Spring

XTB Modify Irregular-Pitch Spring (S90+)

• It is finely manufactured from A class piano wire.
• Very durable and strong. 
• Irregular pitch coiling for enhanced performance.
• Very Consistent FPS. 
• Easy to install.
• Every spring has gone through vigorous and Sophisticated quality tests from the moment a new design leaves the software drawing through to final mass production.

The XTB Modify S90+ coil spring with irregular-pitch is designed for enhanced performance. Precision manufactured of the high-grade piano wire with high durability and strength, the XTB Modify S90+ is easy to install.