This is just a weight rack; it does not include any weights, so yes, you may use your own weights.
The weight comes in 10 pounds intervals with the highest at 200 pounds.
While you may find a retailer that bundles weight with the bench, the bench itself does not come with any weights.
Unfortunately this particular model does not come with additional cups.
There are 16 ounces in a pound so if the watermelon is 10 pounds that would be 160 ounces.
They come in all sizes and weights. About 5 pounds is average for a 10 amp charger.
Barbells typically come in a range of weights, starting from as light as 10 pounds and going up to 45 pounds or more. These weights can be adjusted by adding or removing weight plates to suit different fitness levels and workout goals.
Lower weights are called feather weights cause their lighter and weaker than upper weights.
Ankle weights always come in pairs so these are two weights.
This does not come with weights but you can purchase arm and leg curl attachments separately.
Dumbells come in a wide variety of weights. Choose a size that works for you.
Erasers (commonly knowns a rubbers) come in all shapes, sizes and weights. Probably the smallest is the eraser that fits on the end of some makes of pencils.
Aircraft come in many sizes and weights. The smallest are sport planes carrying only the pilot and weighing as low as 1,000 pounds or less. Mid size airliners are around 300,000 pounds and fighter jets are around 40,000 pounds. The largest current aircraft is the A 380 which takes off at 1,200,000 pounds.