Nellcor FOAM P-IProduct overview Foam strap From Covidien Suitable for securing D YS, OXI A N or PXI P I sensors Available in various designs 1 pack contains 100 pcs Nellcor FOAM The Nellcor FOAM strap is used to secure D YS sensors and OXI A N or OXI P I sensors. 1 pack contains 100 pieces Available in the designs FOAM A N (to secure OXI A N and D YS sensors) and FOAM P I (to secure OXI P I and D YS sensors)