Chromacol 20-MCBC 20mm Composite Magnetic Blue Crimp Cap, 8mm Hole, Aluminium/Tinplate , Pack of 500. Request price. Chromacol 22-CV 22ml Headspace Crimp Vial Round Bottom, Beveled Edge, Clear Glass. Request price. Chromacol 27-CV 27ml Headspace Crimp Vial Flat Bottom, Beveled Edge, Clear Glass. Request price.