Material: Steel NF Certification: NF316 [High-Quality Material]: Protective sleeve made of premium material. Crafted from high-quality 316 stainless steel, super durable, corrosion-resistant, and rust-proof. [Size Information]: Sleeve length: 0.78 inches. Sleeve inner diameter: 0.21 inches. Sleeve outer diameter: 0.275 inches. Flange diameter: 0.47 inches. [Function]: These stainless steel protective eyelets shield cables in columns from wear and tear, maintaining proper cable railing tension over time. [Easy to Use Installation]: No glue needed; rail cables easily thread through the holes. Using the included drill bit for drilling is recommended. [Wide Use]: Widely applicable for wood posts, deck railings, stair railings, handrails, etc. Cable Railing Stainless Steel Protective Sleeve The stainless steel protective sleeve prevents cables from fraying inside the post. With its help, your cable railings will look better and be more stable. Widely used as cable protection for wood posts, deck railings, stair railings, handrails, etc. Perfect for indoor and outdoor use Features: Suitable for 1/8\", 5/32\", 3/16\" railings Material: high-quality 316 stainless steel Length: 0.78\" Sleeve inner diameter: 0.21\" Sleeve outer diameter: 0.275\" Flange diameter: 0.47\"