Door Gasket Material
B is 2-1/4"
The number of be drilling holes will descend
[Precise Design]: Process view sight glasses are often installed as a semi-permanent fixture on a variety of tanks and offer the ability to view product within the tank without exposing it to outside elements
Hole Saw Set19 Pc s,Ideal for Soft Wood, Plywood, Drywall, PVC 10Mesh Door Gasket Material[The Most Complete Hole Saw Kit]: Our hole saw set includes 12 most common sizes of saw blades: 3 4" (19mm), 7 8" (22mm), 1 1 8" (28mm), 1 1 4" (32mm), 1 1 2" (38mm), 1 3 4" (44mm), 2" (51mm), 2 1 2" (64mm), 3" (76mm), 3 1 2" (89mm), 4" (102mm), 5" (127mm), 6"(152mm), 2 mandrels, 2 drill bits, 1 hex key, 1 installation plate. These tools are there to satisfy all your needs. [Material]: Made of heat treated and blackening treated carbon steel, hole saw