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0.6 module 9-17 teeth 1.98/2.28/3.16/4.98 mm bore diameter Total thickness: 3 mm/6 mm Material: brass Please check the size carefully before ordering. › See more product details; Product description 0.6 module 9-17 teeth. Inner hole: 1.98/2.28/3.16/4.98 mm bore diameter. Total thickness: 3 mm/6 mm. Material: brass. Practical use in remote controlled aircraft of various models. Thank you for visiting, any problems can be personally contacted and solved with the shop!; Product description 0.6 module 9-17 teeth. Inner hole: 1.98/2.28/3.16/4.98 mm bore diameter. Total thickness: 3 mm/6 mm. Material: brass. Practical use in remote controlled aircraft of various models. Thank you for visiting, any problems can be personally contacted and solved with the shop!; 0.6 module 9-17 teeth. Inner hole: 1.98/2.28/3.16/4.98 mm bore diameter. Total thickness: 3 mm/6 mm. Material: brass. Practical use in remote controlled aircraft of various models. Thank you for visiting, any problems can be personally contacted and solved with the shop!