THERAPY PUTTY SET - T.O.451-C Contains 4 types of putty for hand rehabilitation with a range of resistance: soft, medium, firm and extra-firm. 85 g containers. SOFT (YELLOW) - T.O.451-C1 MEDIUM (RED) – T.O.451-C2 FIRM (GREEN) – T.O.451-C3 EXTRA-FIRM (BLUE) – T.O.451-C4