Pro Iron Adjustable Dumbbells with Gloss Finish and Secure Fit Collars Sold as Pair, Hold up to 200LBS Help to Prevent Your Dumbbells from Rolling and Protect Your Floor Heavy Duty Plastic Tray, Weight 1LB, Size: 14.4" x 5.4" x 1.8" . Fit Perfectly with Our Adjustable Dumbbell Tray Only, Dumbbells Sold Separately.