Materials ABS Plastic, Thermoplastic Rubber, PVC Plastic, Thermoplastic Elastomer Features Phthalate Free Measurements 7.75" x 2.25" / 19.75cm x 5.75cm (Cylinder) 4.5" x 1" / 11.5cm x 2.5cm (Probe) 1" / 2.5cm (Ring Diameter)