Lovely tactile feel to this new “Lava colours” version of the Homo Sapiens. I chose terra red. It feels amazing. The RB pen officially takes Euro Rollerball cartridges but it also fits Pilot G2, Pentel Energel and Mitsubishi Uniball refills, so good. The spring for all this refill compatibility comes pre-installed in the end cap. One problem with the rollerball version of this new Lava colour series is that the magnetic cap attracts the rollerball refill metal tip so you have to concentrate while closing the cap. The fountain pen doesn’t have this problem! Because gold nibs are not magnetic. Super fast delivery by IguanaSell, arrived in Australia in 1 week.