Quick Answer: The Retort Ring without Boss Head is a closed circular support ring on an extension arm for holding separatory funnels, filter funnels and round-bottom flasks. It needs a separate bosshead to mount it on a retort stand and comes in 50 mm, 75 mm, 100 mm, 125 mm and 150 mm variants.
Last updated: October 2026
Key Features
Closed circular ring for support all round the vessel
Extension arm that takes a separate swivel or fixed bosshead
Rounded internal edges against the glass
Epoxy powder coating or zinc plating
Five ring diameters from 50 mm to 150 mm
Technical Specifications
Specification
Value
Material
Mild steel or cast iron
Geometry
Closed-loop circular
Finish
Epoxy powder coating or zinc plating
Attachment
Extension arm (requires separate bosshead)
Diameters
50 mm, 75 mm, 100 mm, 125 mm and 150 mm
Application
Filtration, distillation, separatory funnel support
About This Product
Because the ring has no fixed bosshead, the user can pair it with whichever bosshead gives the right reach for a given set-up. It is used in school and college chemistry for gravity filtration, phase separation and distillation assemblies.
Frequently Asked Questions
Is a bosshead included with the Retort Ring without Boss Head?
No. The ring is mounted with a separate bosshead, which can be a swivel or fixed type.
What ring sizes are available?
It comes in 50 mm, 75 mm, 100 mm, 125 mm and 150 mm variants.
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