The 66fit hand therapy putty is a soft bleed-proof, nontoxic, clean, non-oily, putty that is colour coded for progressive resistance exercises.FeaturesMaterial: SiliconWeight: 450g/1lbColour: YellowFirmness: SoftDescription*** Please note this is a 450 gram tub and is recommended for all hand sizes. It is ideal for clinics and practices where the putty can be divided into smaller 85gms sizes for individual patient use ***Designed to meet a wide range of hand/arm strengthening needs, putty can be squeezed, stretches, twisted or pinched. Great for carpal tunnel syndrome exercises.Each colour coded hand putty comes in a plastic sealable tub.