RAINBOWS are derived from the success in design and construction used in the BLACKBIRDS they benefit from the same high moment of inertia and the hard-wearing finish. So What.. Nearly all the weigh is in the ends SO if you play with soft hands and let the mallet do all the work .. they stay online.
The colour is the same as on your coloured window frames. Bonded to the aluminium and tough as goats teeth. The naked brass ends give maximum energy transfer to the ball/s and they look good too.