Product details:

Constructed from 7075-T6 heat-treated aluminum, these sprockets are precision CNC-machined to the strictest quality standards. They feature a proprietary mud groove design that results in 44 percent more tooth surface area, which dramatically increases sprocket life. Their deep-penetrating anodized finish is durable and looks great, too! The number of teeth is laser-etched onto each MX RS sprocket for easy identification. Outlast the competition with ProTaper MX RS (Race Spec) rear sprockets!