Those are MBQQ legs from Amazon Canada.
Amazon.com equivalent: https://www.amazon.com/Weven-Industrial-Modern-Furniture-Triangle/dp/B07TLM2Y9X/ref=sr_1_10?crid=2D2TDUCCRCV5G&dchild=1&keywords=desk+metal+legs&qid=1613599070&sprefix=desk+metal+le%2Caps%2C209&sr=8-10