Bottle gauge of road bike It is not attached with a washer to fix the carbon, so fixing it directly does not hurt the damage or scratches of carbon, so use this washer Because it has elasticity Also relieved from tightening torque Initially, tightening If you are concerned about looseness due to pressure, I think that it is good if you check the tightening torque.
There are no problems with the product, but packaging will come. Why do you send plastic washers in small cardboard boxes? It also sent for M5 and M4 one by one, divided into two. The cushioning material got more bulky than the product and the pouch of the washer was buried (laugh) It is useless! Useless resources!