Miller DuraHoist Confined Space Manhole Collar Cotton It also runs on alkaline

It also runs on alkaline batteries (just two AA's) so you don't have to remember to charge it

Quick-close rubber tab with hook and loop closure

this is the perfect vest for you

You can then scroll through the peaks to see the readings

Meets CPAI-84 Standards

Miller DuraHoist Confined Space Manhole Collar Cotton It also runs on alkalineThe Miller DuraHoist manhole collar is designed to easily and quickly mount to manhole collars. Simply slip the collar into manhole, tank hatch, or other opening and then mount you DuraHoist mast. That's all it takes and your ready to go. The DuraHoist collar is available in a variety of sizes: 17. 5 in. (. 44m) Manhole Collar for use with 18 in. to 20 in. 19. 5 in. (. 50m) Manhole Collar for use with 20 in. to 22 in. 21. 5 in. (. 54m) Manhole Collar