K-meta = Potassium Metabisulfite (Periodic table, potassium's letter is K)
https://www.amazon.com/s?k=potassium+metabisulfite+for+wine&crid=QCELQQWU6CHO&sprefix=potassium+meta%2Caps%2C140&ref=nb_sb_ss_ts-doa-p_2_14
And for your previous question the product is 1Step, same as EasyClean, and...