Need some help to know this prescription eyeglass frame -LH 2003!

[mens glasses]

my sister likes LH 2003, is it a mixed rim frame? Comparing with the common metal frames, what's the feature of mixed ones? how much is reasonable? cheaper than the metal? This website is saling LH 2003, but, i can't understand their description. The price is very very cheap at $14.50, click this link to see:
Prescription Glasses | Discount Glasses Eyesglasses - LH2003
pls let me know! thanks