It is used for the determination of the softening point of bitumen. It consists of Two steel balls; each 9.5 mm in dia. Two Brass rings, tapered of brass. Ball Guide Two Ring Holder One Bath Beaker of heat resistant glass, Inner Dia. 8.5 cms and depth 12 cms approx.B2008BRing & Ball Apparatus, electrically heatingSimilar to B2008, but supplied with a heating plate with an energy regulator which permits fine regulation of temperature. In addition, there is an electrically operated Stirrer mounted on a stand with chuck and glass rod or aluminium rod and for stirring the water in the water bath. Operation on 230 V, single phase, 50 cycles, A.C. supply.