This product is suitable for the Yamaha Neos 50 2T 02-03 E1 [SA151/ 5RN]. Set of 2 Exhaust Studs (M6 x 16mm). Length of Thread: 16mm. Racing Planet UK specialise in scooter parts and small capacity motorcycle parts, with everything from electrical parts, braking, cables and mirrors to engine, transmission, exhausts and accessories.