Brass fittings-- professional and practical design with beautiful appearance easy to carry and use. T8 copper nut-- easy install no modifications needed. replace old or broken with a new one. T8 lead screw-- adopts precision production to the stable characteristics and high reliability. 3d printer parts-- fine workmanship and exquisite detail design. it's not easy to rust corrode or stain practicable and long time service life. T8 nut-- this nut is made from material for durability and.