3M Mildew Res. Silicone Option:3oz The heat sink design requires

The heat sink design requires no fans and permits stacking without losing cooling ability

Recommended Amplifier Power (RMS): 50-175w

Professional-Grade Durability — Built to the standards Norwegian sailors and coastal workers have trusted since 1877

Block filled with a very stiff chemical resistant polypropylene bristle

Lightweight & Comfortable: The foam construction is lightweight

3M Mildew Res. Silicone Option:3oz The heat sink design requiresHigh quality silicone sealant For above the waterline interior exterior sealing Mildew resistant, non yellowing, non sagging formula Adheres to bare and painted metal, fiberglass, glass, non oily woods, many plastics and abraded rubber Moisture curing 3M Marine Grade Silicone Sealant is designed for the harsh marine environment. Formulated as mildew and high temperature resistant, this sealant provides a durable and long lasting seal.