This is a rc CEN GST monster truck shock (suspension) protector. It must be printed using a flexi filament such as NinjaFlex. It is designed to attach to the suspension unit of the GST RC monster truck and acts to prevent dirt and grime damaging the shock and rubber seals. This helps to prevent shock oil leakage. I use this on my CEN GST and they work like a charm, haven't even become damaged. Each shock protector required no raft or support structure and will only use 2.5 grams of filament. Print Time @ 0.25mm layer height = 25mins.