Material: carbon springs, thicker steel, ABS plastic handle, high density webbing lanyard
30kg: body length of 57cm, elastic ring diameter 3.5cm, spring length 24cm, handle length 10cm, gross weight 1.2kg
40kg: body length of 58cm, elastic ring diameter 3.8cm, spring length 26cm, handle length 10cm, gross weight 1.4kg
50kg: body length of 61cm, elastic ring diameter 4.1cm, spring length 27cm, handle length 10cm, gross weight 1.65kg
60kg: body length of 62cm, elastic ring diameter 4.2cm, spring length 28cm, handle length 10cm, gross weight 1.75kg