This is a pre-bend metal hose brake caliper to rubber hose. You will not need to try to bend to fit, very easy to install. Please double check that the caliper you are installing this on has UNF (Imperial) Threads. Which came on the TR4, TR4A, TR250, TR6 up to about 1972 and GT6 to about 1972. To check the threads on your Triumph Caliper simply remove the old metal line and then screw in the rubber hose into the caliper. If it fits tight into the caliper threads you have the correct UNF threads. If the hose threads in but can wiggle back and forth, that is incorrect.