From 1 to 10 kg when removing or adding weight (300 gr each). 30 weights of 300 g each. Evenly distributed weights. Very practical. Composition: Neoprene Original Colour by Producer: BlackColour: BlackMade in: ChinaLength: 60 cmMaterial: NeopreneThickness: 6,5 cmWeight: 10 kgWidth: 41 cmSize: One Size