This is the HPI R4 Medium Cold Glow Plug for .25 size engines.
AKA Racing Premium Tire Glue
ARRMA 1/10 GRANITE BLX Brushless MT RTR Green/Black
ARRMA 1/10 GRANITE MEGA Brushed RTR
ARRMA 1/10 VORTEKS MEGA Brushed RTR Orange/Black
ARRMA 1/8 KRATON 6S BLX Brushless 4WD RTR