Question 1

Are the weights themselves solid steel under the neoprene?

Accepted Answer

The 'brutto'- weight of one 1Lb-dumbbell is Wb = 460.9g. To know the volume I put it in the Pyrex measuring cup with 800mL of water - the water level becomes 890mL (this measuring is not exact but I've what I have) - so V = 90mL One mL of water is 1cm3. I prefer cgs-system (cm - g - sec), not SI. To guess the metal I've to take away neoprene volume Vm = V - Vn. In assessment of geometry I replaced two hexagons with their corresponding circles and all round squares with straight angled ones. I guess neoprene is h=2mm thick including gaps. Vn= ~ h x 4 x (3.14 x D1^2/4) - 2 x (3.14 x Do^2/4) + 2 x 6 x Yo x Zo + 3.14 x Do x Z =  0.2cm x 3.14 x 4.3cm^2 - 3.14 x 2.4cm^2/2 + 2 x 6 x 2.1cm x 1.6cm + 3.14 x 2.4cm x 8.6cm = 0.2cm x  58.09cm2 - 9.05cm2 + 40.32cm2 + 64.84cm2 = 30.84cm3 . The weight of the metal is the 'netto'- weight Wo = 454g. The density is: d = Wo / Vm = 454g / (90cm3 - 30.8cm3) = ~7.7g/cm3 - The Cast iron density is: d(Fe) = 7.87g/cm3.  I  could congratulate myself with a pretty good guess that the metal inside this 1Lb-dumbbell is a kind of cast iron. Though stainless steel is in the same range but I think they took the cheapest variant. So probably if neoprene is not hermetic enough then the iron inside this dumbbell could rust. I wiped it dry after I submerged it in a water. I don't think that my sweat would penetrate and humidify that iron to rust unless it's already did rust which I doubt. At least I know for sure that it's not lead (Pb) inside. It's not a copper (Cu) alloy which is heavier and much less cheap. Thanks, China!

Question 2

How can I order the stand alone?

Accepted Answer

Don’t order the stand. It’s the most terrible design for a stand ever created.

Question 3

Is the grip on these easy for small hands?

Accepted Answer

The grip IS NOT designed for small hands. Purchased the 15lb s and had to return bc they aren’t easy to hold. My hand barely closes around them. I don’t want to crush my chest bc I dropped the weight doing presses.

Question 4

Where are these made?

Accepted Answer

China

ASIN	B01LR5SAIA
Best Sellers Rank	#1 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #1 in Exercise & Fitness Dumbbells
Brand Name	Amazon Basics
Color	Black
Customer Reviews	4.8 4.8 out of 5 stars (127,285)
Global Trade Identification Number	00841710155846
Handle Diameter	4 inch
Handle Material	Cast Iron, PVC
Item Dimensions L x W	8.97"L x 4.36"W
Item Weight	12 Pounds
Manufacturer	Amazon
Material	Cast Iron, Polyvinyl Chloride (PVC)
Model Number	DB1001
Number of Items	1
Number of Pieces	2
Other Special Features of the Product	No-Roll Head
Part Number	ND-12LB
Set Name	Yes
Style	12 Pound, Pair
Target Use Body Part	Hand
UPC	841710155846 840095875578 843639101935
Unit Count	2.0 Count

Amazon Basics Neoprene Dumbbell Hand Weights for Exercise and Muscle Toning

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