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	#286 in Sports, Fitness & Outdoors ( See Top 100 in Sports, Fitness & Outdoors ) #24 in Dumbbells
Brand Name	amazon basics
Colour	Black
Customer Reviews	4.7 4.7 out of 5 stars (6,244)
Global Trade Identification Number	00841710155846
Handle Diameter	5.5 inch
Handle Material	Neoprene
Item Dimensions L x W	22.8L x 11.1W Centimeters
Item Weight	10.8 Kilograms
Manufacturer	Sun Malleable Private Limited, Gadaipur Randhava Masanda Jalandhar Punjab 144002, Sun Malleable Private Limited-Punjab
Manufacturer Contact Information	Sun Malleable Private Limited, Gadaipur Randhava Masanda Jalandhar Punjab 144002
Material Type	Cast Iron, Neopreane
Model Number	DB1001
Number of Items	1
Number of Pieces	2
Other Special Features of the Product	No-Roll Head
Packer Contact Information	Sun Malleable Private Limited-Punjab
Part Number	ND-12LB
Set Name	5.5 KG Dumbbell Set
Style Name	5.5 KGS Each
Target Use Body Part	Back, Hands
UPC	841710155846 840095875578 843639101935
Unit Count	2.0 Count
Warranty Description	1 Year limited warranty on manufacturing defects. For warranty, contact - Phone: 1800-419-0416 or Email: [email protected] (Working hours: 10am to 6pm on Monday-Friday except National Holidays)

amazon basics Neoprene Dumbbells, Set Of 2, (5.5 Kgs Each ) - Black

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