Feature: 1. SILICONE MATERIAL: Imitating the structural characteristics of human skin, it is made of silicone material that is closest to the texture of human skin. 2. NON TOXIC AND HARMLESS: Food grade solid 3mm thick silicone, non blacking, easy to cut thread color, non toxic and harmless. 3. HIGH DEGREE OF SIMULATION: The simulation is high and the effect is three dimensional and realistic, suitable for practicing back tattoos and large area tattoo designs. 4. REAL TATTOO EXPERIENCE: Get a more realistic tattoo experience, allowing tattoo artists to master tattoo skills faster and better. 5. HIGH QUALITY: The high quality silicone exercise skin has a texture close to that of human skin, soft and elastic, and can be used on both sides with high efficiency. Specification: Item Type: Full Back Tattoo Practice Skin Product Name: Silica Gel Target Users: Tattoo Artists, Tattoo Beginners Product Size: Approx. 51x38cm / 20.1x15.0in Thickness: Approx. 3mm / 0.12in Package List: 1 x Tattoo Full Back Exercise Skin Note: Please allow 0‑1mm / 0‑0.04in error due to manual measurement. Thanks for your understanding.​