product introduction: hoop also called hoop, hose clamps, hold or the loop is made of a material component of another material. 1 .product introduction: hoop also called hoop, hose clamps, hold or the loop is made of a material component of another material, it belongs to the fastener. Hoop is a sign post embedded to hold a band, it is two and a half from the left and right to hold a band to join ...