Lifelong LLRP01 Rubber Weight Plates 30mm Dia (2.5 * 2= 5kg) Set for Weight Lifting, Dumbbell Bars, Strength Training and Home Gym Fitness Workout, Black : Amazon.in: Sports, Fitness & Outdoors
Source steel plate 30mm thick on m.alibaba.com
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Mild Steel Rectangular 30mm MS Plate, For Industrial, Material Grade: E350
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Weight Plate Standard 30mm - Tunturi New Fitness B.V.