The 2 grams is the weight of the roll, also pictured, but not real clear. I tried to catch the sunlight directly on the coins in the last 2 pics. For comparison, the 1965-70 coins weigh 11.50 grams, and the 1971 onward weigh 11.34 grams. The item "Bank Roll of 20 1964-P Kennedy Half Dollars 90% Silver BU 7" is in sale since Friday, December 10, 2021.
This item is in the category "Coins & Paper Money\Coins\ US\Half Dollars\Kennedy (1964-Now)". The seller is "57fordfairlane500" and is located in Alameda, California. This item can be shipped to United States.