GripSeal™ ScrewCap BesTubes feature translucent polypropylene microtubes with specially designed screwcaps.  To enhance handling, identification, and a better seal, GripSeal ScrewCaps feature exterior gripping bands with color-coded stripes and a special integrated inert TPE molded inner seal for maximum closure and security. 

When compared to competitive o'ring or lipseal closure designs, this integrated TPE molded seal design is superior in sealing, better in temperature resistivity (LN2 vapor to autoclaving), and greater in g-force rating.

• GripSeal screwcaps feature color-coded strips with enhanced exterior gripping bands 
• Autoclavable, GripSeal™ ScrewCaps with integrated inert TPE molded seals for secure closure
• Color coded 'striped' screwcaps for sample identification
• Autoclavable polypropylene microtubes, Translucent for the highest clarity in sample identification
• Microtubes are graduated in 100µl increments
• Frosted writing surface and fit all popular micro-centrifuges
• Packaged RNase, DNase, DNA, and Pyrogen Free; Non-Sterile
• Can withstand centrifugation to 20,000 x G
• Suitable for vapor-phase liquid nitrogen storage, -80°C freezers, boiling and autoclaving

Specify Color on ScrewCap's outer GripSeals: 
Solid White, White Striped GripSeals, Red Striped GripSeals, Orange Striped GripSeals, Blue Striped GripSeals, Green Striped GripSeals, Yellow Striped GripSeals, Violet Striped GripSeals, or Assorted Striped GripSeals.

ScrewCaps feature TPE (Thermoplastic elastomers) molded seals. TPE is composed of crosslinked (covalently bonded) structural components to enhance strength and elastivity for better sealing.