78959 Type: Coolant Through Adapter Size: #3 (1.888) Tap Size Range: 3/4 & 1 PIPE TAP Tap Size: 1 Tap Shank Dia.: 1.125 in Tap Shank Square: 0.843 in Length: 0.43 in Diameter: 2.75 in Depth Tap Enters: 1.68 in A- Length B- Diameter