Product Features

  • 2-pack adjustable boss head clamp holders. 
  • Available for rods up to 16mm and 21mm.
  • Made of high-quality Aluminum Alloy body with plastic knobs, ensuring it durable and sturdy constructed. 
  • Large, easy-to-rotate knobs help provide extra leverage to easy and accurate adjustment. 
  • Widely used in labs for keeping the clamp in place. 


Product Options

  • up to 16mm: XL-815474
  • up to 21mm: XL-815475


Adjustable Bosshead Clamp Holder, Boss Head, Aluminum Alloy Body, 2 Pack

SKU: XL-815602
Rod Diameter
  • Processing Time

    Usually Ship in 5 - 7 Business Days. Shipping may take longer than expected during COVID-19.

Customer questions & answers



Just received it. Haven't heated, or dropped, it yet. The interior diameter of the opening is 1 3/8 in, or 34.9 mm, which means a #8 stopper should work.<br><br>No visible bubbles or deformations.

Brandon Shelton

First things first, if you do decide to purchase this to use with a Buchner funnel you are absolutely going to need adapters or cones for your funnel. If you search "buchner funnel adapters" on here you should be able to find them.<br><br>Glass arrived with no visible defects. Have used several times with a glorified aquarium pump and Buchner funnel for distillation and making tinctures. Works without issue, but the mouth of the flask is quite large and Buchner funnels tend to run "thin." To remedy this just buy adapters.

Dawood Ajmi

BROKEN!! ITEM ARRIVED BROKEN, Shattered Glass Allover the Package!!!

Evan Clinthorne

Great value. Works as needed. Minor imperfections that do not impact use.

Jason huston

Cracked Bad rubber .I don't think this is rubber it is flaky dry garbage that will drop crumbs of rubber into your expierament



120 Lake Ave S Suite 22
Nesconset, New York 11767


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