Now you can quickly and easily add more fun activities to your railroad! Our HO Siding Set lets your trains branch off the mainline to take care of important operations such as filling thirsty engines or empty tanks. This Water Fill Siding Set includes a classic snap-together Plasticville U.S.A. water tank building kit, a colorful single-dome tank car, enough snap-fit Steel Alloy E-Z Track to create a 40 siding Manual Right-Hand Turnout, one piece 18 Radius Curved Track, two pieces of 9 Straight Track, and Hayes bumper all in one convenient package.