I Highly recommend dumping the Polyurethane bushed in the bin for the two front one on the radius arms, Go the Nissan Genuine Rubbers one mate, everything else is Junk! put the Urethane everywhere else if you have to and you have spent the cash but the radius arm bushes are different. Rubber or nothing here mate. You will be back to do them again very soon otherwise.

What car are you fitting them too? a GQ or GU? what are you replacing? Original Nissan OEM ones or caster correction urethane ones? If you are replacing genuine Nissan ones then check out the Kms you got out of those ones on your Odometer. There is No Better on the market mate.

my 2c