1513 Spring perch/mount for the Burr King 150/200 vibratory bowls.  

The 1513 is an expandable rubberized nut that holds the spring in place.   Two 1513 are needed for each spring.  It is recommended to replace all perches mounts at the same time.  The 150/200 have 5 1514 springs.  10 - 1513 perch mounts are needed to replace all.