Hot Racing TE1901 Black Aluminum Multi Mount Caster Blocks Made by Hot Racing; Hot Racing is a United States based company; parts are sourced from Chinese producers All Hot Racing upgrade parts are direct replacements for stock components; additional parts are not required Hot Racing part number TE1901; UPC 083745569155 This item works with: Traxxas Nitro Slash, Rustler VXL Velineon Brushless, Rustler XL-5, Slash 2WD all versions, Stampede Electric, Stampede VXL, Stampede XL-5