★ 【HEAVY DUTY MATERIAL】: The Y-grooved wheels are made of 45# galvanized steel，which have excellent wear resistance, corrosion resistance and durable to use. ★ 【STRONG LOAD CAPACITY】:Great for carry up heavy duty sliding gate. ★ 【DOUBLE BEARINGS】: There are two rolling bearings built in each groove wheel for well sliding. ★ 【SMOOTH ROLLING】: These track rollers have much less rolling friction on an inverted v-track, sliding smoothly and quietly. ★ 【WIDE APPLICATION】: The rigid roller can be widely used to wire rope rail device, rolling gate, inverted track, DIY Gym Equipment，industrial machines, and so on.
