Matala® Disc Diffusers with Self-Weighted Base

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. Model Description Flow Rates Connection Weight Pond Size MD-3W 3-Inch Diameter. Self-weighted, silicone rubber disc diffuser, soft and easy to clean. 3 lpm to 5 lpm / 0.1 cfm to 0.2 cfm 3/16" connector barb .4 lbs Small ponds and aquariums MD-5W 5-Inch Diameter. EPDM rubber disc diffuser, easy to clean. 8 lpm to 35 lpm / 0.3 cfm to 1.2 cfm 3/8" connector barb 1.75 pounds Small ponds     MD-7W 7-Inch Diameter. EPDM rubber disc diffuser, easy to clean. 15 lpm to 65 lpm / 0.5 cfm to 2.3 cfm 3/8" connector barb 3.3 pounds Small ponds