以上为部分品牌产品展示 ，具体请关注图中二维码

The following are some of the brand products show , please scan the QR code in the picture

CONCERT SERIES                                                                                                                            

Technical description: 

Hand-polished, red copper cavity (C3-B3), range of 6 degrees.

Hand-polished, red copper cavity (A2- G # 3), range of 8 degrees.

Hand-polished, copper cavity (F2-e3), range 8 degrees.

Hand-polished, red copper cavity (D2- C # 3), range of 8 degrees.

Hand-polished, copper cavity (C2-B2), range 8 degrees.