The patented designed set contains a latex neck seal firmly sealed between neck rings. Neck seal has large opening; ribbing lines for cutting; raised ports to stop drainage into tubing; (2) port caps and an accessory port. Small Hood contains two additional 22mm ports and measures 10 7/8” (276mm) x 10 ½” (266mm). Neck seal is single-patient, multi-use and Hood is multi-patient use.