Amazon.com : Shimano KMC 410N-CL Master Link Single 1/2" x 1/8" / 3 Piece Black : Bike Chains : Sports & Outdoors
Amazon.com : Bike Chain Master Link Single Speed Bike 1/2X1/8 Bike Chain Link Connectors Suitable with All Single Speed Bike BMX Bike Fixie Bike and Some Mountain Bikes for Men Single Speed
SHIMANO Fixed Gear chain Track cycling bike single speed chain 1/2″x 1/8″ | eBay
Shimano Nexus CN-NX10 Chain Single Speed 1/2" x 1/8" 114 Links Box of 20 - Walmart.com