These replacement pods are compatible with the Smok RPM 4 Pod Device and come in a set of three. It has a magnetic connection, bottom silicone fill port, and a 5.0 mL e-juice capacity. https://www.vapeuniverse.co/products/smok-novo-4-empty-replacement-pods?pr_prod_strat=pinned&pr_rec_id=9a18c41a0&pr_rec_pid=8526893220092&pr_ref_pid=8526654079228&pr_seq=uniform