Arrow Fastener Co. 1/4IN Insulated Black Staples - 591188BL 1/4IN Insulated Black Staples For use with No. T59 wire gun tacker. Size 1/4" H x 5/16" W. U.L. Listed. PRODUCT FEATURES INSULATED Boxed Color= Black PRODUCT SPECIFICATIONS Width(in): 12.36 Height(in): 6.24 Length(in): 8.72 Weight(lb): 0.27 Estimated Cubic Size (cu in): 16.81 Model: 591188BL Hardware Tools Hand Tools Staplers-Tackers Arrow Fastener Co Accessories