Suit GQ TB42S (Carby)
This is the heater hose that connects the heater to the engine.
The brand of hose is GATES who make quality aftermarket hoses.
Over time, hoses become hard and this makes them weaker and prone to cracking, causing you vehicle to lose water and overheat. Generally, if one hose goes, it is possible for others to go soon after, so sometimes a good idea to replace your other heater hoses at the same time.
We also sell a Hose kit to suit a TB42 Carby with 6 different heater hoses if you wish to replace more than just the one. Part number is CHVP28