This Nylon pulley can be used for smooth linear motion on the 8mm width parts.It has a 8mm width groove that can exactly fit our 8mm width beams or rods.Each pulley need 2 Non-Flanged Ball Bearings.
? Light Nylon material.
? smooth linear motion on the 8mm width parts such as Beam0808,and Beam0824,or Gear Rod
? Make the sliding system virtually friction-free and low noise
? Sold in pack of 4,Including 4 Nylon pulleys and 8 Non-Flanged Ball Bearings.