Material: Steel, Stainless steel, Carbon steel, Steel Alloy Product Name: Sports stainless steel, steel alloy, Carbon Steel Hammer throw Usage: competition or training Certificate: IAAF Packing: Carton Box Logo: Customized Logo Printing OEM AND MDG: both are OK Weight: 3 kg, 4 kg, 5 kg, 6 kg, 7.26 kg Hammer body: With smooth surface Warranty: 1 Year