Original Name / Part No.: AR330478 ; Part location: Rear dampers position ; Product major functions & usage: Minimize the vibration of the car and maintain good balance when driving. Is this part adjustable? If yes … how and why/purpose? YES ; How: Adjust the spring using the spring retainer. Purpose: To adjust the hardness of the dampers. Accessories: Damper 2pcs ; 16mm Balls 2pcs ; Stainless Steel Cap Head Screw 3x28 2pcs ; 3x7.8x2 Alloy Shim 2pcs ; 3mm Lock Nut 2pcs ; Major advantages of upgrading to this part/product : 1. Made with a quality light weight high tensile strength aluminum 6061 T6 for greater durability. The spring coil has increased from original 1.6mm to 1.7mm for more powerful use. 2. The shock shaft has thickened to 5mm thick and smoothly polished to achieve higher durability. 3. Silicone oil is filled with smooth travel. 4. Two-section spring design avoids bending due to long-term compression. Other special notes and comments: Suitable for ARRMA 1/8 RC TALION 6S BLX SPEED TRUGGY, 1/8 4WD TALION 6S BLX-ARA10648 .