Dental Sectional Matrix Bands Convenient: Sectional design and hole protrusions for easy clamping, placement and removal, improving work efficiency Quality Material: Durable elastic stainless steel provides stable clamping force and long-lasting performance Precise: The curvature allows the matrix band to better wrap teeth, forming perfect marginal ridge 4 sizes: dental sectional matrix bands includes 4 sizes (3.5mm, 4.5mm, 5.5mm, 6.5mm) for all tooth types