What size is the coolant hose

[mrzabala]

Hi, the car is a 91 240sx base hatch. It has a blacktop 98. The heater core was removed and we did the bypass by cutting of the nipple tube of the heater core. Now the return line is leaking where it meets the clamp and hard line (got pinched and cut underneath). Anyone know the inner and outer diameter and any other helpful information? The help is much appreciated.
Modified by mrzabala at 9:59 AM 11/11/2006