This is a RB Innovations High Performance Blue Cyclone Air Filter. FEATURES: Blue filter element __ Blue silicone 90 degree air filter elbow A "RB INNOVATION.COM" decal on the top of the air filter Easily mounts to any 12mm or larger carburetor (all .21-.28, TRX 2.5, and O.S. .18 engines on any chassis INCLUDES: One air filter _ One 90 degree elbow Three decals Two tie wraps SPECS: Air filter height: 1.72" (43mm) Air filter diameter: 2.00" (50mm) Elbow height: 1.44" (36mm) Elbow inside diameter: .51" (13mm)Rb InnovationsPart RBVRBAF3994-03A