These replacement pods are compatible with the Smok RPM 4 Pod Device and come in a set of three. https://www.vapeuniverse.co/products/smok-rpm-4-pods?pr_prod_strat=e5_desc&pr_rec_id=358226a32&pr_rec_pid=7846686589180&pr_ref_pid=8286811521276&pr_seq=uniform