Bowflex SelectTech 552 Dumbbell Replacement Base Tray Cradle Nautilus 5-52 lb Bowflex SelectTech 552 Dumbbell Replacement Base Tray provides a secure and organized foundation for your adjustable weight system. Crafted by Nautilus, this durable black plastic cradle is specifically designed for the 5-52 lb dumbbell model, ensuring a perfect fit for weight plates and the handle mechanism. It features integrated safety warning labels and a sturdy underside with non-slip feet to protect your flooring and keep your equipment in place during home gym workouts. Ideal for replacing a damaged base or completing a set. #Activewear