Lionel O Gauge track systems measure 1 1/4" between the outer rails. O-27 Gauge Tubular Track comes in 27" diameter curves. To connect tubular track to FasTrack™ use O-gauge Transition Track 6-12404

PRODUCT SPECIFICATIONS

Gauge: O Gauge

Brand: Lionel

Dimensions: Length: 7 3/8" x 7 3/8"