SizSpring Calibration Tamper 58mm FREE Singapore Shipping For the Perfect Tamp and perfect espresso every single time! (Perfect for training and new baristas) 30 Pounds of tamping force. The theoretical proven amount of force one should apply on their tamper to extract out consistent espresso every time. Take the guesswork out of your tamping and rely on the calibration tamper, perfect 30 pounds of force each time. Ergonomic polished wood handle cups your hand perfectly, making it a pleasant experience to tamp. Heavy base for stability and easy to use, when the spring inside the tamp pushes down during your tamp, you will know that you have tamped 30 pounds of pressure! Fantastic as a learning tool for new baristas and to prevent wastage of coffee grounds because of tamping problems, e.g. too little or too much strength applied on a regular tamper. Please note that as this is real wood, the actual shade or grain of wood may vary. Colour: Polished Wood with stainless steel Size: L x W x H : 6.4cm x 6.2cm x 11cm , 20.9gram