NUOLUX Men Adjustable Shoe Tree Stretcher - 2 Pairs (Black) Color: Black. Material: Plastic, metal. Shoe strecther length: about 25-32cm. Suitable for shoe size(EU) from 39 to 45. Can well keep your boots or shoes in a good shape. Easy to wash, allowing you to maintain them always clean before use. Extend the life of your shoes by making them more comfortable.