Genuine HT spare/option part. Fits Carson Gas Devil/ Hell Devil 4x4. Not for Thunderbolt!.Measures:Inna diameter: 31,4 mmOuter diameter: 37 mmLength short spring: 103 mmCoils short spring: 8 StückLength long spring: 143 mmCoils long spring: 10 StückFront axle:VersionMeasuresColorItem N°GD012.3 x 103 mmyellowy0350/01GD022.4 x 103 mmredy0350/02GD032.6 x 103 mmbrowny0350/03GD042.75 x 103 mmbluey0350/04GD052.8 x 103 mmsilvery0350/05GD062.9 x 103 mmblacky0350/06Rear axle::VersionMeasuresColorItem N°GD072.3 x 143 mmyellowy0350/07GD082.4 x 143 mmredy0350/08GD092.6 x 143 mmbrowny0350/09GD102.75 x 143 mmbluey0350/10GD112.8 x 143 mmsilvery0350/11GD122.9 x 143 mmblacky0350/12HelpThe stock springs have 2.5 mm wire diameter. The Gas Devil / Titan shocks are factiry filled with silicone oil 500, which is slightly soft in rear and way to soft in front. In rear brown springs with oil in the 800 - 900 range or blue springs with 900 - 1000 range oil should be fine for bashing. In front blue springs and 1500 silicone oil are a good point to start from. Due to the size of the shocks you need two bottles of oil pes axle.Contents:2 pieces