TUV Test Report for BONOSS Wheel Bolts M15x1.25 Decarburization Test-hardness method/Retempering Test/Hardness Test (No: 01 220 CHN/T-2001621)
TUV Test Report for BONOSS Wheel Bolts M15x1.25 (For Mercedes Benz GLE (W167) / GLS (X167) ) Decarburization Test-hardness method: (Test Method: refer to ISO 898-1:2013+Cor-1:2013) Retempering Test: (Test Method: refer to ISO