Beijing Kono Equipment Co. Customization: lithium-air battery dies, laboratory dedicated lithium battery dies, laboratory simulation batteries, battery dies, the lithium-ion battery dies, the results of simulation experiments designed to introduce the latest battery Japan, allowing you to experiment in battery experiments more efficient and convenient. Hollow battery Dimensions: Lower: outside diameter 46.5mm; inner diameter of 27mm; high 14.5mm hollow hole parts: an inner diameter of 10mm; 30mm high PTFE components: high 22mm; inner diameter of 18mm; solid battery no ventilation holes. Contact: 010-59433981 13381481646 QQ: 2996250870 2994416985 Website: http: //www.kenuo17.com