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: Stick to 3.3 borosilicate glass for high thermal shock resistance. Top Product Recommendations Graham Condenser Zoro& more Go to product viewer dialog for this item.
A budget-friendly, high-quality borosilicate piece designed to connect via rubber stoppers rather than ground glass joints, perfect for educational or basic home lab use. Available at Home Science Tools .
Laboy Glass Coiled Condenser Reflux Column Condenser 14/20 Joints 100mm eBay - bookmarkdeals Go to product viewer dialog for this item.
Best for large-scale operations requiring maximum cooling area. Features a long 500mm spiral tube and 24/40 joints. Found at Walmart and Geyer Instructional Products .
A specialized reflux column for intensive cooling in organic chemistry. It uses a 14/20 joint and has removable hose connections for easier cleaning. Available on eBay.
: Ensure the ground glass joints (e.g., 24/40, 14/20) match your existing flasks and adapters.
: Stick to 3.3 borosilicate glass for high thermal shock resistance. Top Product Recommendations Graham Condenser Zoro& more Go to product viewer dialog for this item.
A budget-friendly, high-quality borosilicate piece designed to connect via rubber stoppers rather than ground glass joints, perfect for educational or basic home lab use. Available at Home Science Tools .
Laboy Glass Coiled Condenser Reflux Column Condenser 14/20 Joints 100mm eBay - bookmarkdeals Go to product viewer dialog for this item.
Best for large-scale operations requiring maximum cooling area. Features a long 500mm spiral tube and 24/40 joints. Found at Walmart and Geyer Instructional Products .
A specialized reflux column for intensive cooling in organic chemistry. It uses a 14/20 joint and has removable hose connections for easier cleaning. Available on eBay.
: Ensure the ground glass joints (e.g., 24/40, 14/20) match your existing flasks and adapters.
*Discount applied on the current website price at the time of order. Offer only valid for new customer first contacts order over $10. Maximum discount of $100. Cannot be combined with any other offers. Promotions are subject to change without notice. We reserve the right to cancel orders that are in breach of the terms and conditions of this offer.
| Lens Width | Bridge Width | Temple Length | |
|---|---|---|---|
| XS | < 42 mm | < 16 mm | <=128 mm |
| S | 42 mm - 48 mm | 16 mm - 17 mm | 128 mm - 134 mm |
| M | 49 mm - 52 mm | 18 mm - 19 mm | 135 mm - 141 mm |
| L | >52 mm | >19 mm | >= 141 mm |
Buying eyewear should leave you happy and good-looking. Use our sizing tool to find frames that best fit your unique facial measurements.
Grab a regular card with a magnetic stripe on the back. Student IDs, credit cards and gift cards work well to start our online PD tool.
You may have received our paper PD measurement tool in your recent online order. In order to use this tool, place the ruler on your eyes so that the "0" lines up at the centre in between your eyes. Add up the two numbers, to get your PD. See example below:
Click on this link to download and print your own PD measurement tool.
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