Will fit directly outside of a 3/30 curve. Can be used on a 2, 4, 6 or 8 lane track. 
Contents: 
- 12 - 4/15 curves (12 pieces make a 180 curve) 
- Track connection clips
Details:
- Radius of Inside edge of track 31.5 in (80 cm)
- Radius of Outside edge of track 39.37 in (100 cm)
- Outside Diameter of 180 turn : 78.74 in (200 cm)
Can be used with the following systems: 
- Evolution 1/32 
- Digital 132/124 
Used with permission, Copyright 2019 Carrera Toys. Copyright 2019 Brey Corp. t/a Hobby Works