Three segment, anodized aluminum, heating/mixing blocks hold up to three different size and type of vessels at the same time. To anchor blocks to either a 145mm or 135mm diameter hotplate/stirrer, use our 13698-03 (145mm) or 13698-05 (135mm) base plate. To remove blocks when hot, use our 13698-09 T-handle extractor. Blocks, base plates, support rods and T-handle extractor can all be ordered separately.