Track systems and technical lights https://3dsky.org/collection/shared/5239335 

Mini Magnetic track system with radius elements and flexible lights that can be integrated into any bend of the busbar. It is presented in an overhead and embedded version.
The track size is 10.5 x 15 mm.
There are 3 variants of radius elements: D=600, 900, 1200 mm.

https://ferosvet.ru/products/trekovaya-sistema-mini-magnetic-f86289420/?parent-baobab-id=lsbxcgnms4