I just use one like this but not bright green lol
https://www.amazon.com/Master-Lock-1505D-Combination-Assorted/dp/B000BDB550/ref=mp_s_a_1_1_sspa?c=ts&dchild=1&keywords=Combination+Locks&qid=1597949166&refinements=p_n_feature_keywords_browse-bin%3A2801350011&sr=8-1-spons&t...
https://www.amazon.com/Master-Lock-1505D-Combination-Assorted/dp/B000BDB550/ref=sr\_1\_3?dchild=1&keywords=master+lock&qid=1630089550&sr=8-3