12 1 2 7 8 July 8, 2019 16 32 64 128 12 1/2 divided by 1 7/8 12 gauge 7 1 2 vs 8 shot 4 2 *( 1 8x9 )- 7 12 4 1 2 x 7 8 x 12 in toilet supply line 12 7 8 plus 1 2 7 8x 12 =- 1 8x 2