|  | 5906 | Cap membrane kit, black, 1.0 mil, Teflon, 85, 5905, 5010, & 5239 polarographic sensors | $41.00 |
|  | 5908 | Cap membrane kit, yellow, 1.25 mil, PE, 550A, DO200 & Pro Series 5203 polarographic sensors | $43.00 |
|  | 5909 | Cap membrane kit, blue, 2.0 mil, PE, 556 polarographic sensors | $45.00 |