3M™ Attest™ Sterilization Biological Indicator Vial, 1 Box of 25 Dividers and Tabs TheraBand© Hand Exercisers are specially Jobst Opaque Sensitive TheraBand© Hand Exercisers are specially formulated exercisers provided in a progressive sequence of five translucent colors and in two sizes *They're used for hand finger and forearm strengthening as well as hot and cold therapy *Progressive resistance in different levels of compression allow each exercise to be geared to the patient *Use the standard size hand exerciser for smaller hands and the extra large size for larger hands or for people who have limited hand mobility *Place a Hand Exerciser into the microwave or refrigerator for hot or cold use *Lbs of Force at 50% Compression: 17 lbs *Black XL Closure type: Twist tie Self contained indicators significantly reduce possibility of contamination minimizing false positive and assuring more accurate results