We chose Aluminum 7075-T6 for the material and also provided 5 colors for you to select.
There are 19 pcs of screws in one pack.
Besides mutiple choices for the color, the weight will be reduced about 5.8 g after replacing our M17 Lightweight screw set!
M17 Lightweight Screw Set :
http://www.hiro-seiko.com/products_d2.php?c1_id=5&c2_id=16&c3_id=366