Do you need portable and usefulpulley block set for physical experiment? If so, take a quick look at this item. Made of metal, nylon materials, practical and excellent. Simple look design and exquisite craftsmanship ensure its popularity and practicality, excellent durability. Features -Color:As Shown -Material:Galvanized iron, nylon -Size:34.00X15.00X8.00cm/13.36X5.89X3.14in -Note: not includeddynamometer or weights. -Multipurpose and useful, suitable for school, classroom, laboratory, can be used to demonstrate the principle of pulleys and how they work. -Can be used for physical experiment, mechanics experiment, science experiment, pulley block set is useful. -With single pulley, double pulley, rope, bracket, pulley block kit cam meet your different experimental needs. -Useful design,pulley block kit is simple to use, suitable for hanging, excellent performance. -Wonderful workmanship, simple and delicate design, convenient and useful to use, suitable for students, teacher.Packing list2 x brackets2 x bases4 x single pulleys4 x double pulleys2 x ropes 120cm2 x ropes 60cm8 x hooks