Redline BMX Sprocket. Thhis gear fits Redline Flight cranks and most any 3pc cranks that have a 19mm spindle.Will not fit 1pc cranks unless you widen the center hole. FYI: You can use a 1/8" chains on 3/32" sprockets.
Information from Redline seattlebikesuppy.com (search their site if you like):
Based on the original Flight "cross" chainring, but tricked out for new-school looks. Larger crosses, more CNC work. CNC machined from 5mm thick 6061 aluminum. Fits 3/32" chain & 19mm spindles. 39 thru 46t.