Will this melt in the sun?

Inside the sun, yes. In the sun on earth, no. If your are looking for something non toxic that melts below 90F, you want gallium (melting point 85.6F)

What's the purity of the metal?

The cube is 95% tungsten with nickel-iron for the remainder.

Why does the description say this only weighs 4.8 oz?

Hello, this item weighs 0.66lbs. We are unable to edit that shipping weight field, Amazon has entered it in error.

what is the measurement tolerance of the cube?

The cube is +/- 0.002" on all dimensions.

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Tungsten 1 Cube Block Weight by Midwest Tungsten Service

Tungsten 1 Cube Block Weight by Midwest Tungsten Service

Product ID: 126279034

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Details

Brand
Midwest
Puzzle type
Assembly &
Manufacturer Minimum Age (MONTHS)
168
Number of pieces
1
Product dimensions
25L x 25W
Theme
science

📏Compact 1-inch cube size

⚖️Ultra-dense 294.84g weight

🛡️Rounded safe edges for handling

Description

⚡️ Hold the weight of innovation in your hand!

VERSATILE TIMELESS - Perfect for teachers, professionals, or collectors seeking a unique, tactile object that blends science with style.
DESK CONVERSATION STARTER - Elevate your workspace with a sleek, dense cube that sparks curiosity and admiration from colleagues and clients alike.
SAFE COMFORTABLE HANDLING - Rounded edges ensure a smooth, non-toxic touch—ideal for everyday carry or classroom demonstrations without worry.
CERTIFIED AUTHENTICITY EDUCATION - Comes with a certificate of chemical composition and fascinating tungsten facts to impress your inner science geek.
SURPRISINGLY HEAVY SURPRISINGLY COMPACT - Experience the power of aerospace-grade tungsten in a perfect 1-inch cube that fits in your palm but packs a serious weight punch.

This 1-inch cube block is machined from aerospace-grade tungsten, boasting an ultra-dense 294.84g weight in a compact form. Rounded edges ensure safe, comfortable handling, making it perfect for professional desks, educational use, or everyday carry. Each cube includes a certificate of chemical composition and tungsten facts, blending scientific authenticity with a sleek, modern design.

Specifications

Product Dimensions	2.54 x 2.54 x 2.54 cm; 294.84 g
Manufacturer recommended age	14 years and up
Item model number	893
Educational Objective(s)	Hand eye coordination, concentration ability
Number of pieces	1
Assembly Required	No
Batteries Required?	No
Batteries included?	No
Material Type(s)	Tungsten
Colour	Gray
ASIN	B012E6IWPC