Description GPM Racing - TEAM LOSI - LASERNUT TENACITY U4 - LU4086F Aluminum Front Thickened Spring Dampers 86mm 8pc set This product includes :Damper-2pcs9mm Balls-2pcsStainless Steel Round Head Screw 3x16-2pcsStainless Steel Round Head Screw 3x23-2pcs3mm Lock Nut-4pcsOriginal Name / Part No:LOS233011Part location:Front dampersProduct 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 1.4mm to 1.5mm,2.1mm coil also available for more powerful use.2. The damper shaft has thickened from 3.5mm to 4mm and smoothly polished to avoid bending.3. Alloy body with shock-absorb cap to seal tightly and avoid leaking.