Premium toner cartridge engineered for Sharp SF-S315R/S285R copiers with 100% OEM-compatible micro-fine polymer formulation. High-density carbon-free drum core prevents ghosting for 5,000+ page yield at 5% coverage. Precision-molded ABS housing with anti-leak silicone seals ensures crash-proof transport for bulk shipments. Ideal for high-volume office printing, educational materials, and commercial copy centers. Laser-calibrated hopper delivers ±0.01g accuracy for streak-free documents. Includes bio-degradable packaging meeting international air freight standards.