Medium Pore Air Diffuser Stones Bubble size {1-3MM}

Air Stone Model #1111 {.5" x .5" x 1.5"} with 5/32" OD Poly barb, Medium Pore Air Diffuser Stone {Same as AS1}

Air Stone Model #1112 {.75" x .75" x 1.5"} with 5/32" OD barb, Medium Pore Air Diffuser Stone {Same as AS2}

Air Stone Model #1010 {1" x 1" x 1"}with 3/16" OD barb, Medium Pore Air Diffuser Stone

Air Stone Model #1020 {1" x 1" x 2"} with 3/16" OD Poly barb, Medium Pore Air Diffuser Stone {Same as AS3}

Air Stone Model #0020 {1.5" x 1.5" x 1.5"} with 3/16" OD Poly Barb, Medium Pore Air Diffuser Stone {Same as AS4}

Air Stone Model #1030 { 1" x 1" x 3" } with 3/16" OD Poly barb, Medium Pore Air Diffuser Stone {Same as AS5S}

Air Stone Model #1031 { 1" x 1" x 3" } with 1/4" OD Poly barb, Medium Pore Air Diffuser Stone {Same as AS5L}

Air Stone Model #0030 {1.5" x 1.5" x 3""} with 3/16" OD Poly Barb, Medium Pore Air Diffuser Stone {Same as AS8S}

Air Stone Model #0031 {1.5" x 1.5" x 3"} with 1/4" OD Poly Barb, Medium Pore Air Diffuser Stone {Same as AS8L}

Air Stone Model #003N {1.5" x 1.5" x 3"} with 1/2" NPT Poly, Medium Pore Air Diffuser Stone {Same as ALR8}

Air Stone Model #0061 {1.5" x 1.5" x 6"} with 1/4" OD Poly Barb, Medium Pore Air Diffuser Stone {Same as AS15S}

Air Stone Model #0062 {1.5" x 1.5" x 6""} with 3/8" OD Poly Barb, Medium Pore Air Diffuser Stone {Same as AS15L}

Air Stone Model #006N {1.5" x 1.5" x 6"} with 1/2" NPT Poly, Medium Pore Air Diffuser Stone {Same as ALR15}

Air Stone Model #0091 {1.5" x 1.5" x 9"} with 1/4" OD Poly Barb, Medium Pore Air Diffuser Stone {Same as AS23S}

Air Stone Model #0092 {1.5" x 1.5" x 9"} with 3/8" OD Poly Barb, Medium Pore Air Diffuser Stone {Same as AS23L}

Air Stone Model #009N {1.5" x 1.5" x 9"} with 1/2" NPT Poly, Medium Pore Air Diffuser Stone {Same as ALR23}

Air Stone Model #00141 {3" x 3" x 1.5"} with 1/4" MPT OD Poly, Medium Pore Air Diffuser Stone {Same as ASW88S}

Air Stone Model #00121 {1.5" x 1.5" x 12"} with 1/4" OD Poly Barb, Medium Pore Air Diffuser Stone {Same as AS30S}

Air Stone Model #00122 {1.5" x 1.5" x 12"} with 3/8" OD Poly Barb, Medium Pore Air Diffuser Stone {Same as AS30L}

Air Stone Model #0012N {1.5" x 1.5" x 12"} with 1/2" NPT Poly , Medium Pore Air Diffuser Stone {Same as ALR30}