The Gorilla Sports 97.5 kg cast-iron dumbbell kit is ideal for strength-building exercises. This kit includes 1 long bar 170 cm, 2 short bars 35 cm, 18 cast-iron weights and 6 clamping stars. The cast-iron weights are extremely sturdy. The star clamps secure the weights to the bar for safe use. This 30 mm bar is only compatible with 31 mm bore weights. Detailed specifications:6 x 1.25 kg weight discs (diameter: 12.5 cm, thickness: 2.1 cm). 6 x 2.5 kg weight discs (diameter: 16 cm, thickness: 2.4 cm). 2 x 5 kg weight discs (diameter: 20.7 cm, thickness: 2.7 cm). 2 x 10 kg weight discs (diameter: 26.8 cm, thickness: 3.2 cm). 2 x 15 kg weight discs (diameter: 31 cm, thickness: 3.8 cm). 1 long bar 170 cm - Weight: 10 kg - Grip surface per side: 31.1 cm. 2 short bars 35 cm - Weight: 2.5 kg each - Grip surface per bar and per side: 10.4 cm. 6 star-shaped clamping rings. Bar diameter / weight bore: 30 mm / 31 mm. Solid cast-iron discs. Disc color: gray.