No Sales Tax Outside of California Free Shipping on Scuba Gear Scuba Instructors Answer Calls & Assemble Dive Gear 120 Day Return Policy

View All Octos/Spare Air

Demonstration Video:
Video: Hollis 321 Octo Video Review

Mfg Part Number :
Share this item:

Hollis 321 Balanced Octo

Free Standard Shipping

Customer reviews see below


  • Brand new & completely redesigned with MaxFlex Hose 
  • Not like most other sites that sell the old discontinued model with a standard regulator hose
  • MaxFlex hose - lightweight, flexible, double braided hose designed to
    outperform and outlive traditional rubber hoses
  • Pneumatically balanced second stage 
  • Nitrox Compatible to 40% (The Recreational Limits of Nitrox)
  • Orthodontic mouthpiece 
  • "Diver Adjustable" venturi to prevent unwanted free-flow
  • Lightweight 2nd stage to prevent jaw fatigue and add to overall comfort
  • Bright "Hi-Viz" yellow hose and 2nd stage cover for easy identification
  • 36" Hi-Viz neon yellow hose
Scuba Deluxe Round Protective Regulator Bag Add $29.95

Scuba Beach Towel $9.95

Octo Holder $5.95

Polar Fleece Beanie $10.00


You Pay:

You Save:

ask an expert

2 Questions
2 Answers

Questions & Answers
More About This Product
Instructor Reviews

Customer Reviews for Hollis 321 Balanced Octo:

Ask an Expert a Question

See the top 20 most helpful scuba gear reviews

Average Customer Review: based on 3 reviews.

Rating: Your welcome!
Reviewer: Paddy Jordan-Higgins,   
Thats what Ill be saying to my buddy, next time they run out of air. Once theyve tried this octo theyll want to be buddy-breathing all the time!! While I havent had to use it yet, Ive used it on a couple of dives as my reg (just to try it out!). Super comfortable, effortless breathing. Not the cheapest octo on the market, but worth every cent I paid for it!! I would reccommend everyone buy this octo - you will not be dissapointed!!

Did this Review help?

17 out of 34 people found this review helpful.

Rating: Hollis Octo
Reviewer: Morris Tencer,  - View all my reviews
Great Octo same unit as the secondary great price

Did this Review help?

230 out of 455 people found this review helpful.

Rating: excellent
Reviewer: David Herzog,  - View all my reviews
a good octo good enough to use as a primary.

Did this Review help?

237 out of 501 people found this review helpful.

View all Hollis Octos-Spare-Air

  • Choose

Product Information Questions? Contact our certified instructors
E-mail our instructors at info@scuba.com

Corporate Office: Scuba.com, 1752 Langley Avenue, Irvine CA 92614

Privacy Policy
Scuba diving portal for scuba equipment
Scuba requires professional scuba diving training and certification
Prices subject to change.
Copyright 2000-2014