Self-adhering, tool-free mountingNo dynamic imbalance of the wheel.We have strengthened the adhesive power to ensure even greater durability even on very thin spokes down to 1.5 mm.We have adjusted its flexibility in the spoke area.Low profile avoids air drag.Dimensions: 0.91 * 2.32inch02) flexible bending areaWeight: 0.6 gram eachHigh-grade microprismatic retro- technology03) special adhesive applicationNo oscillation or noise.Quantity: 6pcsColor: SliverIncreased the approx 10%.6X reflective strip01) stiff reflective side panels