For: Hope E4, RX4 The Advantage of Our Elite Pads A ceramic brake pad is a heavy duty brake pad that has been gaining a lot of popularity in the past couple of years. The materials are the composition of ceramic porcelain and clay. These pads are very durable and smooth gripping ability. The most amazing fact is that it works very quietly. The elite ceramic pads will be resistant to 300 degrees Celsius without loss in the event of braking power. But its therming dissipine speed is slower than our Plus Semi-metallic pads. Colour: purple Material: ceramic Package Contents: 4 pair * Bicycle Disc Brake Pads Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.