20 ml glass, clear; 20 mm crimp neck; round bottom; 75.5 x 22.5 mm. 961-10020-11. alu cap 10 mm centre hole; silicone white/PTFE beige; 3.2 mm thick; 45° shore A. 961-10030-04. 961-10010-29. plain aluminium cap 10 mm centre hole; silicone blue transparent/ PTFE white; UltraClean; 3.0 mm thick; 45° shore A. 961-10030-22.