How do i take a part out of a table to use it?

So i have 2 parts in a model named Part1 and Part2. I inserted part1 into a table, so how can i use that part from the table on other things.

db = false
touch = script.Parent
model = touch.Parent
allparts = model:GetChildren()
tab = {}

touch.Touched:Connect(function()
	if db == false then
		db = true
		for i,v in pairs(allparts)do
			if v.name == "Part1" then
				table.insert(tab,model.Part1)
				for i = 1,20 do
					tab[1].CFrame = tab[1].CFrame * Vector3.new(0,0.05,0) --Error
					wait()
				end
				
				print(tab[1])
			end
		end
		db = false
	end
end)

it's saying tab[1] won't work in line 14, even though in my mind it's litterly the same thing as Part1, so i just want to take out "Part1" in the table and make it into a variable.