This is the Helix Color model "YELLOW" , built out of aircraft grade aluminum ( FINS/CRADLE ) and then sand blasted and anodized for great durability and hold, comes with your choice of stainless steel, brass or copper hardware ( BULLETS/PINS/BUTTONS ). As a commitment to our quality all Helix's come with a hybrid ceramic bearing. With a weight of 135 - 145 grams pending on hardware, this is a premium product that has a feel and presence of no other. These our modular ( can be taken apart ) so any Helix model you buy can interchange with another! Check out our other colors and special edition models as well.