Warfarin is a coumarin anticoagulant, which has anti-vitamin K effect in vivo. It can inhibit the synthesis of coagulation factors II, VII, IX and VII in the liver which are participated by vitamin K. There was no resistance to coagulation factors II, _, _and_in blood. Therefore, it can not be used as an in vitro anticoagulant. In vivo anticoagulant also needs active coagulation factor consumption before itrubber keyring can be effective, and its effect and maintenance time are longer. It is mainly used to prevent and treat thromboembolic diseases. Warfarin silicone bracelet is Perfect provider of information in a medical emergency. bracelet-maker-rubberupcycle-silicone-bracelets ds aged 5 to 10. It is made from eco friendly material, so it is harmless to kids health. Since we make it high quality silicone which is soft to wear, kids will love our it much. The product of figured shape, glowing and UV transfer and anti-mosrubber keyringquito is very popular. We can make it figured shape for the logo, like a watch, heart or basketball which has larger size on the wristband, so it will be outstanding and clearer. A glowing wristband glows in the dark with green or blue magicly. The glow last for a bout 3h and it needs to absorb light enery from sun or lamp light before glowing. The kids must like it and be bursting with curiosity. It is good for night event. UV wristband will tranfer its color from transparent to blue or purple. It indicates the strength of UV index. The color will be darker if sunshine stronger. It is good for outdoor ativities like football, basketball and camping. We add some herbaceous oil into the silicone, then it become an anti-mosquito wristband. It can help avoid the attack of mosquito outdoor.