Hot Racing SVXS48FS128 Fs Double Rate Spring Set 1/16 Slash 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 SVXS48FS128; UPC 083745609332 This item works with: Traxxas 1/16 Slash/Rally 4WD, 1/8 Funny Car Eliminator Dragster