features certifications: meets ansi a156.16 for l03061 base diameter: 3-5/32 (80 mm) base to center of rail:2-3/4 (70 mm) materials: brass finishes: us3, us4, us10, us10b, us15a, us19, us26, us26d fasteners: three (3) 10 x 1-1/4 fphws, three (3) plastic anchors, three (3) 10-24 x 13/16 fphms, and three (3) 10-24 lead anchors