1. Material: ABS plastic 2. Reflection color: red, green, blue, white, yellow 3. Work temperature: -20 to 60 degree C aluminum road studs1. Material: ABS plastic2. Reflection color: red, green, blue, white, yellow (for any choice)3. Work temperature: -20 to +60 degree C4. Resist compression: 15 tons5. Item size: 100*102*21mm6. Weight:115g