j nuts for sale, brand-new and used.

J-Kem KEM-Lab 20 mL vial Reactor Block and Evaporator A J-Kem KEM-Lab Parallel Reactor Block, heated, for 20mL vial • KLS-20-H. 12 position block intended for 28x61 mm vials (works well with Qorpak 27.25 -27.75 mm diameter vials). Block is in very good cosmetic condition and includes lid and knurled brass nuts.