Powerhobby Rockform 1 10 SC Belted Tires (2) with Removable Hex Wheels Senton Parts Accolades:Highly regarded as the #1 Accolades:Highly regarded as the #1 Tool in the RC industry 20 plus years of tool production Used by World Champions and hobbyists alike around the WorldWorld Class Products This set includes: (2) Kato 186mm 7 5 16" Concrete Tie Double Straight Track (2) Kato 124mm 4 7 8" Concrete Tie Double Straight Track (1) Kato 62mm 2 7 16" Concrete Tie Double Straight Track (6) Kato 248mm 9 3 4" Concrete Tie Double Straight Viaduct Track (1) Kato 186mm 7 5 16" Concrete Tie Double Straight Viaduct Track (2) Kato 124mm 4 7 8" Concrete Tie Double Straight Viaduct Track (1) Kato Double Track Truss Bridge (Black) (4) Kato 381mm 414mm Radius 45 Degree (15" 16 3 8") Concrete Tie Double Track Viaduct Super Elevated Curve (2) Kato Concrete Tie Double Track Viaduct Super Elevated Easement Curve Left (2) Kato Concrete Tie Double Track Viaduct Super Elevated Easement Curve Right (2) Kato 186mm 7 5 16" Concrete Tie Double Track Incline Track Straight (2) Kato Double Track Incline Pier A1 (2) Kato Double Track Incline Pier A2 (2) Kato Double Track Incline Pier A3 (2) Kato Double Track Incline Pier A4 (3) Kato Double Track Pier (2) Kato Double Track Concrete Pier No 2" wheels w Removable Hex Hex : 12 14 17mm