Accurate information, please! the cylinder itself says 7lb/3 kg. the description says 3lb, so which is it?

The TW (tare weight) and T (tare, same thing) at the top of the bottle collar refer to the weight of the empty bottle and valve assembly. The WC (water capacity) at the collar bottom tells you the volume of incompressible liquid (eg. water) the bottle can hold, and how much that water would weigh all by itself. The mix of avoirdupois, imperial, and metric systems is never confusing, as anyone who worked on the original Hubble telescope project could certainly tell you. Propane is filled into the bottle as a liquid under pressure at a standard temperature (ideally). Because temperatures and pressures will vary, and propane volume will vary with them and with use, the only constant measure available to determine how much propane is in the bottle is weight, which, for you physicists out there, is a proxy for mass. This bottle will hold 3.25 liters of water, which is sufficient volume to hold a bit over 3.0 pounds of propane, with, since people bring it up, enough room left over for safe transition to the gaseous phase. The bottle, with 3.0 pounds of propane in it, will therefore weigh a total of 10.0 pounds. These things are pretty well regulated and common, so if you're buying one by a reputable manufacturer from a reputable seller, you'll get what's advertised. A 3lb bottle will hold three pounds of propane, a 5lb bottle five, etc. Tare weights may be different between brands and on the basis of what is permanently attached, like the valve and the welded-on collar and base, but the bottles will hold what they say, and you will determine how much is inside by comparing the measured weight with the tare weight. Pressure also works, but is not as reliable because it is so dependent on temperature. Note that bottles are not weighed and stamped individually, so there will be some variability within whatever the manufacturer's quality control parameters are. The designs are engineered to account for that. Cheers!

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🔥 Grill smarter, adventure farther with Flame King ⛽

SAFETY FIRST ALWAYS - Equipped with an Overfill Prevention Device (OPD) and DOT/Transport Canada certifications for worry-free transport.
PRE PURGED READY TO FILL - Vacuum-ready tank saves you time and money by eliminating the need for costly purging before use.
RUGGED READY FOR ADVENTURE - High-grade welded steel with powder coating ensures rust-free durability for all your outdoor escapades.
NEVER RUN DRY ALWAYS GRILL ON - Integrated gas meter gauge keeps you in control of fuel levels—no surprises, just sizzle.
COMPACT PORTABILITY MAXIMUM FREEDOM - Lightweight 3lb design with easy-grip collar makes it your perfect companion for camping, fishing, and tailgates.

The Flame King YSN03 is a 3lb steel propane tank featuring a built-in gas gauge for precise fuel monitoring, an OPD valve to prevent overfilling, and a durable powder-coated finish for rust resistance. Pre-purged and DOT/Transport Canada certified, it offers safe, portable fuel for grills, fire pits, and outdoor activities.

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Color	White
Style	3lb Propane Tank with Gauge
Shape	Cylindrical
Material Type	Steel
Number of Items	1
Power Source	propane
Included Components	3lb Steel Propane Tank with Gauge
Brand	Flame King
Manufacturer	Flame King
Item model number	YSN03
Product Dimensions	19.05 x 19.05 x 27.31 cm; 3.26 kg
ASIN	B0C5GF4QGF

Flame King YSN03 3lb Steel Propane Tank Cylinder with Gauge and OPD Valves for Grills and BBQs, Camping, Fishing, & Outdoor Activities, White

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