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 $11.91.) The deals:

• Cap Barbell 10-lb. Cast Iron Kettlebell for $10 ($10 off)
• Cap Barbell 15-lb. Cast Iron Kettlebell for $15 ($14 off)
• Cap Barbell 20-lb. Cast Iron Kettlebell for $20 (pictured, $19 off)
• Cap Barbell 25-lb. Cast Iron Kettlebell for $25 ($24 off)
• Cap Barbell 30-lb. Cast Iron Kettlebell for $30 ($29 off)
• Cap Barbell 35-lb. Cast Iron Kettlebell for $35 ($33 off)
• Cap Barbell 40-lb. Cast Iron Kettlebell for $40 ($38 off)
• Cap Barbell 45-lb. Cast Iron Kettlebell for $45 ($43 off)

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.