(4) Snap Racks™ are constructed of durable glass reinforced polypropylene, with a center well to conveniently hold caps, seals, septa, etc. Racks snap together securely to double your rack capacity.
(2) The Multi-Plug Safety Sleeve is available in clear K-resin or black glass reinforced polypropylene. Use it as a tool to make plug and shell vial assembly easier and safer. The safety sleeve is "Multi" useful because it is designed to work with I mL, 2 mL or 4 mL shell vials. One Safety Sleeve works with all three sizes.