Self-Weighted Disc with Base Information (MD-3W, MD-5W, and MD-7W):
These offer a low back pressure that helps to preserve the lifespan and performance of your air pump.
- MD-3W: Silicone membrane with 3/16" connection; 3 inch diameter
- MD-5W: EPDM membrane with 3/8" connection; 5 inch diameter
- MD-7W: EPDM membrane with 3/8" connection: 7 inch diameter