Dog spike: Diameter from 16mm to 60mm, without length limitation Suzhou Suyu Railway Material Co., Ltd ... fasteners and standard components in China. Our products are approved by BV, SGS. We have granted ISO9001:2008 certificates. Please contact ... clip: PR401, PR309...Rail clamp: Kpo3, Kpo6Dog spike: Diameter from 16mm to 60mm, without length limitationLock washers: WL20, WL24, and Wl22Flat washer ...