2 - 18" Inch Stainless Steel Ball Chain Necklace - 2.4mm - Military Dog Tag Necklace! This is a listing for 2 - 18 Necklaces The Ball Chain Necklaces are 18" Inches long and include connectors Theyre made from polished T304 Stainless Steel They are #3 size (2.4mm ball diameter) chains They are made with polished stainless steel and have a matte finish