Made of aluminum and POM plastic. Cotton reels are oversize paddock stand bobbins, which screw into the paddock stand holes in your swingarm. They offer the dual purpose of protecting your swingarm and enabling the bike to be lifted on a rear stand. Products are skillful manufactured and have dependable performance practical and durable for long term usage. Package included 1 Set of Sliders Bobbin Crash Protector + 1 Set of Swingarm Spools. Aftermarket Fit For Honda CRF250L 2017-2020,CRF250L Rally 2017-2020 in black.