PP Silk is categorized into hollow and solid types,comes in a variety of colors,and has high and low grades.Its price is generally in the range of 12 to 30 renminbi per kilogram.May I know which grade you need?And how many do you need per order? PP Silk is categorized into hollow and solid types,comes in a variety of colors,and has high and low grades.Its price is generally in the range of 12 to 30 renminbi per kilogram.May I know which grade you need?And how many do you need per order?