These versatile Buna-N O-rings are precision-engineered for reliable sealing performance across various applications. Each ring in this 100-pack features a 1/8 inch inner diameter, 1/4 inch outer diameter, and 1/16 inch width, making them ideal for both industrial and general-purpose uses. Manufactured from durable Buna-N rubber with a 70A durometer hardness rating, these black O-rings offer excellent resistance to oils, fuels, and other petroleum-based fluids. The consistent dimensions and material quality ensure a dependable seal every time. Perfect for maintenance professionals, engineers, and DIY enthusiasts who need reliable sealing solutions for their projects. These O-rings maintain their sealing properties across a wide temperature range and provide consistent compression set resistance. The convenient 100-piece packaging ensures you'll have plenty of spares on hand for your sealing needs.