Write data to two columns with Python CSV writer

I am scrapping a website data and want to write that data in two different columns but all data is printing in same single column

This is the code:

from bs4 import BeautifulSoup
from requests_html import HTMLSession
import csv

s = HTMLSession()
url = f'https://everymac.com/systems/apple/iphone/index-iphone-specs.html'
list_data = []
r = s.get(url)
r.html.render(sleep=1)
soup = BeautifulSoup(r.html.html, 'html.parser')
file = open('OutPut.csv', 'w')
writer = csv.writer(file)
writer.writerow(['Product Name', 'Specification'])

products = soup.select('#contentcenter_specs_externalnav_2 a')
specs = soup.select('#contentcenter_specs_internalnav_2 td')
for item in products:
    a = item.text
    print(a)    # want to write this in column 'Product Name'
    for i in specs:
        b = i.text
        print(b)   # want to write this in column 'Specification'

        writer.writerow([a, b])
file.close()

How can I do that it will be great if you can help me with this