Elimination gaps nut is made of copper metal, wear-resistant and strong, . Professional and practical design with beautiful appearance, craftsmanship, reasonable design, compact and practical, and can be widely used in most 3D printers. Features -Color: Golden. -Material: Copper. -Size: About 5.50X2.20X2.20cm/2.16X0.86X0.86in. -Pitch: 2mm/0.08". -Lead: 8mm / 0.31". - , wear resistance. Easy to use, simple to operate, bring much convenience. - It is simple in design, but it's practical to use, which will give you fantastic use experience. - Made of copper, rust resistance, and heat resistance, firm and , can ensure long time using. - Elimination gaps nut, compact and small in size, large load carrying capability, rustproof and . - the transmission gaps between the nut and the screw rod, especially the reverse gaps, to achieve precise transmission. Package list: 4 x lead screws