Sources
1 www.argos.co.uk - https://www.argos.co.uk/product/6206389
2 www.argos.co.uk - https://www.argos.co.uk/product/4744795
3 www.argos.co.uk - https://www.argos.co.uk/browse/sports-and-leisure/weights/kettlebells/c:798665/
4 www.argos.co.uk - https://www.argos.co.uk/sd/kettlebells/
5 www.fitandwell.com - https://www.fitandwell.com/buying-guides/best-kettlebell
6 www.kettlebellsusa.com - https://www.kettlebellsusa.com/pages/what-size-kettlebell-should-i-buy
7 www.physicalcompany.co.uk - https://www.physicalcompany.co.uk/vinyl-kettlebells-physical
