Drilled with 3/8" hole in the center. Our stoppers are manufactured from a premium grade rubber material. This makes the stopper soft, pliable and long lasting. Use with any of our airlocks.
| STOPPER SIZE CHART | ||
| Size # | Bottom Dim. | Top Dim. |
| #00 | 1/4" | 7/16" |
| #1 | 9/16" | 3/4" |
| #2 | 5/8" | 13/16" |
| #3 | 3/4" | 15/16" |
| #4 | 13/16" | 1" |
| #5 | 7/8" | 1 1/16" |
| #5 1/2 | 15/16 | 1 1/8" |
| #6 | 1" | 1 1/4" |
| #6 1/2 | 1 1/16" | 1 3/8" |
| #7 | 1 3/16" | 1 7/16" |
| #7 1/2" | 1 1/4" | 1 9/16" |
| #8 | 1 5/16" | 1 5/8" |
| #8 1/2 | 1 7/16" | 1 11/16" |
| #9 | 1 1/2" | 1 3/4" |
| #9 1/2 | 1 3/16" | 1 9/16" |
| #10 | 1 11/16" | 2" |
| #10 1/2 | 1 3/4" | 2 1/8" |
| #11 | 1 7/8" | 2 3/16" |
| #11 1/2 | 2" | 2 1/2" |
| #12 | 2 1/8" | 2 9/16" |
| #13 | 2 5/16" | 2 11/16" |
| #13 1/2" | 2 7/16" | 3" |
| #14 | 3" | 3 9/16" |