Kettlebell for a complete body workout. The Tunturi vinyl kettlebell 4 kg is a very comfortable kettlebell made of cast iron with a rubber coating. The solid cast iron handle gives the kettlebell a good and firm grip. The coating gives the kettlebell extra protection when the kettlebell is put down. The kettlebell is made of 100% vinyl. This material determines the weight of the kettlebell. Each weight has its own colour. This makes it easy to choose the correct weight. Most important features: made of 100% vinyl firm grip per piece affordable each kettlebell has its own colour