they are made of import PU . The inner part is an steel ball and the outside layer is even 3mm of thick PU to bean to whet the layer ,zero pollution.widely used in electronic and other upscale meterial.
Contact Information:
Company Name:
Zibo Qimingxing New Material Co., Ltd.
Contact Person:
Eileen Wang
Address:
NO.106 SHIJIROAD ZHANGDIAN CITY ZIBO SHANDONG CHINA
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