This chain is new in the box. The KMC K810 chain is designed for heavy-duty BMX freestyle and track bikes. FEATURES: 1/2" X 3/32" 100 links Pin length 7.7mm Compatible with BMX/freestyle bikes Narrow: 3/32" nickel plated Special Dynamic Configured Plates OS outer and tall inner plates for incredible tensile strength Eliminates stretching and chain drop Xtra-strong bull's eye pin rivets Corrosion resistant Sale price. More chains and other items on sale on our website in the link below.