This linear rail block are small in size and lightweight, especially suitable for small equipments. Adopting 4-point design, it can bear load from every direction, and has good strength and high accuracy. Designed with , which allows interchangeability in the case of small precision. Block has lubrication system. Features - Color: Assorted color. - Material: Alloy steel. - Size: 4.00 x 1.70 x 0.70cm/ 1.57 x 0.67 x 0.28 inch. -Note: Random Style - It works great and has no resistance in the bearings when put on a rail, strong and durable to use. - With lubrication system, it works beautifully for both slider motion as well as panning, stable performance. - Suitable for machine arm, precision measuring instruments, office automational equipment. - Professional and practical design with beautiful appearance, easy to carry and use. - Made of materials, wear resistant and firm, durable and . Package list: 1 x slider