I use steel shelves in my office and needed a way to guide cables along the shelving. This model is only designed for 12mmx3mm circular magnets. The magnets I had were actually 2.75mm thick so the model is designed for that. Print in PLA, no supports necessary, press-fit the magnets after printing.

These are the exact magnets I used: [https://www.amazon.com/dp/B0CCXJQJNF?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1&th=1](https://www.amazon.com/dp/B0CCXJQJNF?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1&th=1)