The same precision instrument as a standard hydrometer, but uses a non toxic material instead of lead. 3-scale, packaged in a clear plastic tube that can be used as a test jar with the optional base (pictured, sold separately).
Other Items from Hydrometers & Thermometers Stainless Steel Weld-Free Thermometer - Thrumometer In-Line Thermometer - Base For Greenline Hydrometer - Glass Floating Thermometer - Acrylic Hydrometer Test Jar - Small Probe thermometer - 9" Probe Stainless Steel Thermometer - Greenline Hydrometer - Fermometer Stick On Thermometer - Pro Mash Thermometer -