1/4″ (6.35 mm) pitch Pre-cut to length #25 chain 126 links/pins 126 link, #25 chain for a variety of electric scooters This chain is compatible with the Razor Pocket Mod, Sport Mod, MX350, MX400, and also the Motovox MBxXSe Mini Bike 126 link, #25 chain for a variety of electric scooters. This chain is compatible with the Razor Pocket Mod, Sport Mod, MX350, MX400, and also the Motovox MBxXSe Mini Bike. May also fit other brands of scooters and electric recreational vehicles. This chain consists of 126 links (126 pins) and measures 1/4″ wide. It is a #25 size chain. The link count of 126 includes both inner and outer links, but is sometimes referred to as a 63 link chain if only counting the outer links. If in doubt, count the number of pins needed as this chain includes 126 pins that link together 63 outer links and 63 inner links (126 total). Razor Pocket Mod/Sport Mod Part No.: W15130640012 Razor MX350/MX400 Part No.: W15128040012