It's probably hard to tell in the pic, but the slide is kind of a light bronze finish. It's actually called NIBx which stands for Nickel/Boron.
To pick a bone, it should be NiB. NIB would be Nickel Iodine Boron, or the awesome song from Black Sabbath...
http://www.webelements.com/nickel/
http://www.webelements.com/boron/
http://kbmaffilips.com/nickel-boron_en.html
To pick a bone, it should be NiB. NIB would be Nickel Iodine Boron, or the awesome song from Black Sabbath...
http://www.webelements.com/nickel/
http://www.webelements.com/boron/
http://kbmaffilips.com/nickel-boron_en.html