Feature: Our products come with anti-slip texture and professional design to minimize noise and make walking safer Specification: Dimensions: Heel tip diameter is 8mm, 9mm, 10mm, 11mm, 12mm and 12.5mm Metal pin diameter: 2.4 mm, 3 mm Materials: TPU and iron Package includes: 4 Pairs of 8 mm heel tip (2.4 mm metal pin for 2 pairs, 3 mm metal pin for 2 pairs) 4 Pairs of 9 mm heel tip (2.4 mm metal pin for 2 pairs, 3 mm metal pin for 2 pairs) 4 Pairs of 10 mm heel tip (2.4 mm metal pin for 2 pairs, 3 mm metal pin for 2 pairs) 4 Pairs of 11mm heel tip (2.4 mm metal pin for 2 pairs, 3 mm metal pin for 2 pairs) 4 Pairs of 12mm heel tip (2.4 mm metal pin for 2 pairs, 3 mm metal pin for 2 pairs) 2 Pairs of 10*11mm heel tip (2.4 mm metal pin for 2 pairs, 3 mm metal pin for 2 pairs) 2 Pairs of 10.5*12.5mm heel tip (2.4 mm metal pin for 2 pairs, 3 mm metal pin for 2 pairs)