Suitable For DDSM115 Hub Motor. Easy To Install, Reducing The Design Complexity Of UGV And AGV Chassis. Adopts Compact Structure For Saving Chassis Space. Suitable For Aluminum Profile Chassis: Comes With 20 Series European Standard T-Nuts For Users To Install The Suspension On Aluminum Profile. Provides An Open-Source Profile Chassis Model For Secondary Development. Easy To Build A Fully Enclosed Chassis: For Advanced Users, The Suspension Can Be Installed By Cutting Holes On The Side Of The Chassis Body, And We Also Provide An Open Source Model Of Fully Enclosed Chassis. Adopts 6061 Aluminum Alloy CNC Process, With High-Durability 65Mn* Spring, Ensuring The Overall Strength While Making The Structure More Compact, Saving More Chassis Space.<br><br>Reserved Slot For Neat Wiring: The Suspension Is Designed With Slot For Making The Wiring Of The Hub Motor Neater. When Designing The Chassis, The Cutting Holes On The Car Body Can Be Aligned With The Suspension Slot To Make The Wiring Easier. Colour:Black Material:Aluminum alloy + spring steel<br><br>Package Contents: 1 x High-strength Spring<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.