Constructed by using nylon, copper and stainless steel material, assures the shower door rollers safety and can use them with confidence. Professional and practical design with beautiful appearance, easy to install and use. Perfect for shower door, bathroom glass, door, glass sliding door, etc. Features -Color:Assorted Color -Material:Copper, nylon, stainless steel -Size:1.90X1.90X1.00cm/0.75X0.75X0.39in -Roller diameter: 19mm, Inner hole: 4mm - The wheel is made of copper and nylon wheel, corrosion resistance and rust resistance, with good comprehensive performance. -Pulley is designed to slide smoothly and quietly, providing a comfortable and quiet shower experience. - Pulley for shower door has good bearing capacity, good stability, small friction coefficient, good mute effect. - Shower door sliding rollers are suitable for various glass doors, such as shower doors, bathroom doors, etc. - Easy installation, glass door runners are often used for bathroom glass sliding door or sliding track. Package list: 4 x Shower Door Rollers (Screw Included)