Swingline Rubber Finger Tips, Size 11 1/2, Medium, Amber, 1/Dozen Tough, high quality tips last a long time. Surface nubs ensure positive grip. Extra thick material at tip for longer wear. High grade rubber for added durability. Material(s): Rubber; Size Group: 11 1/2; Medium; Open End Inside Diameter: 5/8"; Color(s): Amber. Extra thick material at tip for longer wear.Swingline