Durable mold spring, hot bed leveling nut, made of high grade aluminum alloy material, so more durable, longer life, and can be reused many times. These nuts have a large torque, so it is easier to fine-tune the hot bed. Compatible with most printers. Features - Color: Red. - Material: Aluminum alloy. - Size: 5.90X5.90X0.50cm/2.32X2.32X0.20inch. - Our screws nuts are made of great material, make the leveling is safer and does not hurt the hand. - Leveling screw nut kit can make the printer much more stable and makes hot bed becomes much steadiness when printing. - Comes with hand twists level nuts, bright colors make happily. - Made of aluminum alloy material, rust and corrosion resistance, nut is more powerful and will twists more tightly than aluminum alloy nuts, . - Professional and practical design with beautiful appearance, easy to carry and use. Package list: 4 x nuts 4 x springs 4 x screws