3M RelyX Fiber Post Introductory Kit. Kit contains: 15 total posts, 5 of each size: 1 (1.3 mm), 2 (1.6 mm), 3 (1.9 mm); 4 drills, 1 of each size: 1 (1.3 mm), 2 (1.6 mm), 3 (1.9 mm), universal, 20 elongation tips, instructions and technique card. Intro Kit