In English… your link was Spanish

Munetoshi 39" Polypropylene Bokken Bokuto Practice Training Samurai Katana Sword with Scabbard https://smile.amazon.com/dp/B09CWSRXXW/ref=cm_sw_r_cp_api_i_H3AXR51W2N2DNDC4ZBF0

That's not a bokken. It's cheap koshirae with a tsunagi of questionable quality.

This is polypropylene, so it's probably similar to the cold steel "bokken." It has a saya that should help with learning nuki and noto, as well as understanding sayabanare.

edit: a link would probably help. derp. https://www.amazon.com/Munetoshi-Polypropylene-Practice-Training-Scabbard/dp/B09CWSRXXW/ref=sr\_1\_7?crid=1YORDQK7MNKZW&keywords=saya+for+bokken&qid=1648494797&s=sporting-goods&sprefix=saya+for+bokken%2Csporting%2C142&sr=1-7