A safer, cleaner alternative to oil baths and heating mantles, blocks are for heating and stirring one to two round bottom flasks at a time, up to 200 °C (392 °F) or 260 °C (500 °F) 20 minutes or less.

Lightweight, solid aluminum blocks heat evenly and feature a deep well design for rapid heat transfer, so flasks will not stick or crack. Polymer or anodized coating provides strong chemical resistance. Blocks have two probe holes for temperature probe (not included), and fit on all common hotplates up to 145 mm in diameter.