Improved: Simple one-hand operation • The snap cap of the tube can be opened and closed just with the thumb of the holding hand. • This makes working with pH-Fix 0-14 PT comfortable and relaxing. Improved: Relaxing easy-close principle • Due to the long tube design the strips do not stick out. • This effectively prevents blockades of the cap due to jammed strips. • The tube can easily be closed with a push of the thumb. • This makes pH-testing convenient and relaxing. Improved: Maximum safety concept • Geometry and material of the tube have been specially selected for maximal stability. • The tube is virtually unbreakable. • It stands firmly on its circular bottom, even when it is slightly moved. • Working with these new tubes is safe. • pack of 100 strips • size: 6 x 85 mm