... Gravel Size: 1-3mm,2-4mm,3-6mm, or according to customer's demand Color: red, yellow, orange, cobalt blue, sky ... glass2. Size : 1-3mm,2-4mm,3-6mm, or according to customer's demand.3. Color : red, yellow, orange, cobalt blue ... and cooperation! I am Ms. Guo, thanks for your time to read this product information, i am waiting for your message. Have ...