It is sterling silver "Blueprint" adds your fashion success! Designed carefully by hand, each Blueprint cufflink was made with a silver-plated backing and coated in enamel to resemble a real blueprint with chalk markings. These Blueprint cufflinks look so authentic; you just might mistake them for the real thing! Design reflects the modern sensibility that has led to exhibition installations at museums including Cooper-Hewitt. Pen has roller ball tip. Cufflinks will measure 3/4”W x 1/2”H. It is having Architectural themed cufflinks are perfect for the builder, architect, or even the weekend handyman. Enamel cufflinks with a silver plated backing. It is Nickel plated and enamel with bullet back closure.