... 5mm 2,weight:16g 3,N/G:8/9kg metal pen with chain :with 2 choice,aother have key chain.have or not ... rubber. 7,metal ball pen with smooth writing. 8,we are OEM,we specialized in metal ball pen,projection pen,lighting pen,plastic ball pen.so wo have high ... quality and competitive price. 9,pen core:metal core. 10 ...