Hydrocollator Heating Unit- Mobile M-2 - 12 Packs Model M-2 * 15.5 W x 23.5 L x 31 H * Accommodates any size Steam Packs® * Comes with (12) standard size Hydrocollator Steam Packs® * Durable and easy to maintain - stainless steel * Non-Digital * Assures a constant temperature * Fully warranted * U.L. listed CSA certified no plumbing neede *