Type 330: Type 330 hangers consist of a single elastomeric load element assembled into a welded steel hanger bracket. A large clearance hole in the bracket at insert allows the hanger road a 15º misalignment. Type 330 hangers are an appropriate selection when space and cost must be minimized.

Type 340: Type 340 hangers consist of two elastomeric elements in series assembled into a welded steel hanger bracket. A large clearance hole in the bracket allows the hanger rod a 15° misalignment. Due to the deflections from both elastomeric elements, Type 340 hangers provide a higher isolation efficiency than do Type 330 hangers.