This distillation set, made from heat-resistant borosilicate glass, is often purchased to produce small amounts of essential oils and perfumes. Includes: 1 Round Bottom Boiling Flask, 500ml capacity with a 24/40 ground glass joint (#FRB500-24-40), 1 Erlenmeyer Flask, 500ml capacity with a 24/40 ground glass joint (#EF500-24-40), 1 Graham Condenser, 300mm long with 24/40 ground glass joints, 1 Distilling Arm with 24/40 ground glass joints (#4009), 1 Support Stand, 1 Support Ring and Clamp (#4-SRC47), 1 Burette Clamp (#4-BC37), 1 Glass Stopper (#4007-GS), These Distillation Arms are made from borosilicate glass. Each have a 24/40 ground glass joint on top, but their bottom joints vary in the size. They are made to fit our biomass flasks.