Specify bore (B2) and length when ordering. Lengths available are 1.5,2.0,3.0,4.0,5.0 other lengths upon request. Material: Tube - Delrin, Clamps - aluminum 2024-T4, Screws - alloy steel, Internal compression spring - 302 stainless steel.
Try: "2mm bore", "spur gear", "stainless steel shafting"