Question

This material is a little expensive,but is of much higher qu

Answer 1

of+一个名词=此名词的形容词形式,比如of importance = important,你这个里面of much higher quality 就是高质量的意思,这么用是因为quality没有合适的形容词形式来表示“质量高”.这种用法一般比较正式.