纸筒管子纸管画筒海报筒包装筒塑料盖子塞子用于纸管/纸筒/塑料圆管端口密封包装,防止筒内装物件跌落,扣入管口即可,应用于小型工艺品,机械零件等纸质或塑料管封盖。内盖常用规格有30,40,50,53,60,63,65,73,76,83,88,99,101,105,114,127,152mm(2寸,2.5寸,3寸,3.5寸,4寸,4.5寸,5寸,6寸)