Description GPM Racing - ARRMA - KRATON 8S BLX MONSTER TRUCK - MAKX187R/L Aluminum Rear L-shape Piggy Back Spring Dampers 187mm 4pc set This item is suitable for ARRMA-1/5 KRATON 8S BLX-ARA110002T1/T2 and ARRMA-1/5 4WD OUTCAST 8S BLX-ARA5810This product includes :Damper-2pcsMetal Spring-2pcsOriginal Name / Part No:ARA330610Part location:Rear dampersDoes this product replace a specific part or function?yesProduct major function & usage:Reduce the friction and absorb the pressure during driving so that the car can be more balanced.Is this part adjustable? YESHow: Adjust the top spring retainer.Purpose: To adjust the hardness of the spring damper.1. Made with a quality light weight high tensile strength aluminum 6061 T6 for greater durability. The spring coil has increased from original 2.5mm to 2.6mm, 2.8mm coil also available for more powerful use.2. The damper shaft has thickened from 5mm to 6mm and smoothly polished to avoid bending.3. Alloy body with shock-absorb cap to seal tightly and avoid leaking.4. L-shape piggy back reservoir extends the travel of the oil which can help to smooth out the drive with better performance.Suitable Model :ARRMA 1/5 KRATON 8S ARA110002T1/ARA110002T2ARRMA 1/5 4WD OUTCAST 8S BLX-ARA5810