The SDI-Astra 300 Spirometer is a handheld device designed for medical and biological laboratory use. It is manufactured by SDI Diagnostics, a trusted brand in the industry. This spirometer is ideal for measuring lung function and respiratory capacity, making it a valuable addition to any medical or laboratory setting. The model number is Astra 300, and it is categorized under Business & Industrial, Healthcare, Lab & Dental, and Medical & Lab Equipment, Devices.