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

Air Stones 6 Pack Model# 1112-6 {.75" x .75" x 1.5"} with 5/32" OD barb, Medium Pore Diffusers

Air Stones 10 Pack Model# 1111-10 {.5" x .5" x 1.5"} with 5/32" OD barb, Medium Pore Diffusers

Air Stones 10-Pack Model #1010-10 {1" x 1" x 1"} with 3/16" OD Poly barb, Medium Pore Diffusers

Air Stones 25 Pack Model #1111-25 {.5" x .5" x 1.5"} with 5/32" OD Poly barb, Medium Pore Diffusers

Air Stones 25 Pack Model #1112-25 {.75" x .75" x 1.5"} with 5/32" OD barb, Medium Pore Diffusers

Air Stones 25 Pack Model #1020-25 {1" x 1" x 2"} with 3/16" OD Poly barb, Medium Pore Diffusers

Air Stones 25 Pack Model #1031-25 {1" x 1" x 3"} with 1/4" OD Poly barb, Medium Pore Air Diffuser Stones

Air Stones 25-Pack Model #1030 {1" x 1" x 3"} with 3/16" OD Poly barb, Medium Pore Diffusers