---In 0-27 track, 8 sections of 6-65033 curves form a circle 27" in diameter - 12 sections of 6-65049 curves form a circle 42" in diameter - 16 sections of 6-65113 curves form a circle 54" in diameter.

---In 0 gauge track, 8 sections of 6-65501 curves form a circle 31" in diameter - 12 sections of 6-12925 curves form a circle 42" in diameter - 16 sections of 6-65554 curves form a circle 54" in diameter - 16 sections of 6-65572 curves form a circle 72" in diameter.

---Insulated track is used to activate certain accessories. Uncoupling track sections are used to activate operating couplers by positioning the coupler over the track section and pushing the button provided. They can also be used to activate some accessories. See the accessory instruction sheet to determine which ones require these track sections.

---0-27 Gauge remote-control switches include one 1122-200 controller. 0-42" diameter remote-control switch includes one 031-200 controller. 0-72" diameter remote-control switch includes one 022-200 controller.