The Hope MONO M4/E4 Brake Pads for Hope Tech 3 E4, Stealth Race E4, Mono M4 and Tech M4 brake calipers. Metallic pads provide more brake power and last longer compared to organic pads. In wet conditions they tend to be more noisy. With sintered pads thermal stress on the brake is higher than with organic pads. Hope Mono M4/E4 Disc Brake Pads Features All Hope brake pads are designed and dyno tested in-house at Barnoldswick. All pads are rigorously tested by Hope and our Pro riders to ensure maximum performance and longevity. Includes all springs and clips.