This is Knobbles and Bobbles' cheerful blue, red and green melon shaped ceramic knob, the diameter of this knob is 3.8cm and the bolt will fit through a door that is up to 2.5cm thick. Longer bolts are available from the top menu under All Knobs -> Fittings and Longer Bolts.
Each knob is supplied with the ceramic head and metal fixings including bolts and washers.
Any questions? Please ring us on 07746 357625.