Amazon discounts a selection of Cap Barbell Enamel Coated Cast Iron Kettlebells, as listed below. Plus, Prime members receive free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping starts at $13.16.) The deals: Cap Barbell 15-lb. Cast Iron Kettlebell for $15 (low by $18) Cap Barbell 20-lb. Cast Iron Kettlebell for $20 (pictured, low by $15) Cap Barbell 25-lb. Cast Iron Kettlebell for $25 (low by $14) Cap Barbell 30-lb. Cast Iron Kettlebell for $30 (low by $15) Cap Barbell 35-lb. Cast Iron Kettlebell for $35 (low by $14) Cap Barbell 40-lb. Cast Iron Kettlebell for $40 (low by $23) Cap Barbell 45-lb. Cast Iron Kettlebell for $45 (low by $19) Of note, Walmart charges the same with in-store pickup for similar models without the coating. Choose from 15 lbs., 20 lbs., 25 lbs., 30 lbs., and 35 lbs.