[Size]: 2.5", O.D.: 80.6mm, I.D.: 71.4mm. [Quality Materials]: The clamp is made of high-quality 304 stainless steel, which is durable, stable, rust and corrosion-resistant, and good for long-term use. [Precise Design]: The 2-piece hinge design of these sanitary clamps provides evenly distributed clamping pressure while maintaining the ease of use that a wing nut style clamp offers. [Wide Range of Applications]: It can be used for connecting pipes, making the pipeline easy to install and better ensuring pipeline sealing. [Convenient Organization and Storage]: Packed in a small plastic bag with a label. The clamp’s lifespan depends on the working environment and frequency of use. Check it regularly for aging, damage, or hardening. The HFS 13MHH Single Pin Heavy Duty Clamps are constructed from 304 stainless steel and intended for use with sanitary fittings. The 2-piece hinge design of these sanitary clamps provides evenly distributed clamping pressure, while the cross-hole wing nut style sanitary clamps allow for quick and easy tightening without the need for tools.