INERTIA BALANCE Comprises two metal trays. 130 x 55 x 23mm joined together by a pair of spring steel strips 10mm wide, the distance between the trays being 215mm. One tray is drilled to hold three equal cylindrical masses. The other tray acts as an anchorage and may be clamped to the bench either horizontally or vertically. Complete with three masses and a ?G? clamp for mounting. Dimensions : 325 x 130 x 23mm overall. Qty :