Bamboo is not only a highly sustainable material, but it looks fresh and appealing too. This is one of a series of 5 gift sets that pair up a bamboo keyholder and pen with metal trims.keyholder: 4 ( dia ) x 0.5 ( h )bamboo & zinc alloy with polished nickel platingball pen: black German inkbarrel: natural bambootrims: chrome-platepresentation box: 16 ( l ) x 12.4 ( w ) x 3 ( h )