Pack of 100pcs CPR Rescue Mask Training Valves CPR One Way Valve for Training Mask - Individually Wrapped

These work just the same as any others. Good value.

Use these for my American Heart Association BLS, ACLS and PAlS courses- great product

These were defective and leaked. Go with the Preston brand. Don't try to save a few dollars.

These CPR mask valves are suitable for training - like the title says. I would not use them in a real life application unless it was the only one I had on hand. I was a little shocked as to how much smaller they were than the ones I typically use. But the larger end worked just fine in the training masks I provide my students during class. The one way feature is good enough for students to understand how that works, but again these are for training purposes only. They are not perfect in that regard. They come individually wrapped, so my students know they are safe and sanitary to use. For the price, I think these are great to hand out for training applications.

One way valves leaked and were defective. Had to purchase new ones from my usual supplier. Delivery took long as well. Would not recommend.