Hydrocollator Heating Units remain the benchmark against which all others are judged. Durable and easy to maintain, these units have an almost indefinite life and ensure a constant supply of temperature consistent HotPacs. This heating unit is a clinical moist heat therapy system designed for the hand and wrist. It includes 4 Hand Size HotPacs, 2 Hand Contour Terry Covers and 2 Dual Pocket Hand Terry Covers.