[Aluminum Aloy]: The timing pulley is made of premium aluminium alloy with exquisite workmanship; Wear resistance, rust-proof, durable & longlasting
[Wide Application]: This timing pulley wheel is widely used for 10mm width GT2 timing belt
[Package Included]: Package comes with 5pcs belt pulleys in one bag which you may use a long time; Good replacement parts for old or broken 3D printer belt pulley