25 Foot Length Ball Chain, #8 Size, Nickel Plated Steel, & 25 Matching Connectors This is slightly larger than regular #6 dog tag chain and has a shiny chrome-like finish #8 size chain has a bead diameter of 5/32 inch (4 mm) #8 Nickel Plated Brass connectors are used for this chain #10 Chain is the industry standard size for vertical blinds Made in USA by Ball Chain Manufacturing Since 1938. We are the manufacturer, not a reseller.