Features: This shower knob is specifically designs for the 100710 Tub and Shower System. The single handle design includes clear markings for C (cold) and H (hot), allowing for easy identification and alignment during installation with the water outlet. The installation can be completed in just a few minutes, making it a easily replacement solution for your existing shower knob. Universals fit design for easy installation on most standard shower faucets. Strong construction ensures long terms use without wear and tear. Specifications: Component: Acrylic Size: about 71.9x60mm/2.83x2.36inch Height: about 43mm/1.69inch Inner diameter: about 37.3mm/1.47inch Insert rod diameter: about 8.4mm/0.33inch Package Includes: 1Pc Clear Temperature Markings Knob note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.