1. Powder coated cast iron housings (70-110 micron ASTMD4138-07a)
2. Internal elastomeric snubbers prevent metal to metal contact
3. Anti-skid elastomeric acoustical pad
4. Built-in leveling device
5. Adjust mounting so that upper housing clears lower housing by at least 1/4" but not more than 1/2"
6. Spring elements color-coded for easy field verification
7. Consult spring chart on page 23 for isolator performance data of Speciation's Sheets