SeaCure Mouthpiece Size Chart

All sizes available in:

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More sizes and snorkels —>

Size 1

Fits regulator size
1-1/8” x 1/2” or 2.86 cm x 1.27 cm

APOLLO
AQUA LUNG – older metal regulators, Conshelf 7 through 21 (snug fit)
ATOMIC – manufactured pre-2005 only
BEUCHAT – Evolution, Iceberg, Nitrox, VXT8, VXT Octo, VX4, VX80
CRESSI – XS Compact (snug fit)
DACOR – Pacer Aero (snug fit), post-1992 models
IST (except Proline is a 2)
NEX – Monterey
OCEAN MASTER
PRO SUB – Avalon
SCUBAPRO – S600, S360, S560, R095, R295, R395, and all models before the A700
SEAC
SHERWOOD – most early models, Brut, Magnum II, Shadow, pre-1992 Blizzard and Oasis
SPARE AIR
SUBGEAR – SG100, SG500, SG1000, Aruba, Bonaire, Cayman
TABATA/TUSA (not TUSA Imprix)

Size 2

Fits regulator size
1-3/16” x 5/8” or 3.02 cm x 1.59 cm

AERIS
AQUA LUNG – Calypso, Core, Helix, Kronos, Legend, Mikron, Titan (Titan LX is a 4)
ATOMIC – manufactured post-2005, Z2, Z3, B2, T2X, T3, M1, ST1, TFX
BEUCHAT – VS3, VS4, VS8, VX10
CRESSI – Ellipse, Master Cromo
DACOR – Viper and Eagle
DEEP 6 – Signature Series
DGX Gears – D6
DIVE RITE – including O2ptima rebreather, but not the Jet Stream 4500
EDGE – Hog and Epic
FORTE
GENESIS
HALCYON – rebreather and regulators
HOLLIS – regulators (except 500SE is a 4)
IDI REGULATORS – no longer in business (all but Osprey which is a size 1)
MARES (not MARES MR-12-II, III, IV or V)
OCEAN EDGE
OCEAN REEF
OCEANIC – including the Alpha 10 (cannot fit Alpha 9 or Omega 3)
ODYSSEY
SCUBA MAX
SCUBAPRO – A700, C200, C300, C350, C370, G250, G260, R195, S270, S620Ti, D420
SEA ELITE
SHERWOOD – 9000 Series, Maximus, SR1, SR2, 1992 and newer Blizzard and Oasis
SPORASUB
SUBGEAR – SG10, SG30, SG50
TIGULLIO
TILOS
XS SCUBA – Inspire and Brawn
ZEAGLE – F8

Size 3

Same diameter as a Size 1 but with double retention ribbing. These regulators do not have the conventional retention lip on the mouthpiece orifice common to all other regulators and therefore no other SeaCure size should be used.

AQUA LUNG – older plastic regulators including Micra
AQUATEC

Size 4

Fits regulator size
1-5/16” x 11/16” or 3.33 cm x 1.75 cm

APEKS
AQUA LUNG – Titan LX
DGX Gears – XTRA
HOLLIS – 500SE
ZEAGLE regulators (except F8 is a size 2)
Many Rebreathers, including Golem Shrimp BOV, Hollis Prism and Explorer, Innerspace Megalodon, Kiss Gem, and Titan (size 2 may be a snug fit)

Size 5

Fits regulator size
1-7/16” x 13/16” or 3.65 cm x 2.06 cm

Poseidon regulators
Poseidon SE7EN CCR
Poseidon VI CCR
Divesoft BOV (snug fit)

Snorkels

Fits many removable mouthpiece snorkels on the market. If your snorkel has two retention lips, it will need a size 3.

Size 1 – Amico, Coral, Cressi-Sub, Dacor, Dive Buddy, Netex, Oceanic, Reef Buddy, SeaQuest
Size 2 – Chiaro, H2Odyssey, IDI, Parkway, Pic, Technisub
Size 3 – Aqua Lung Impulse, Kapitol Reef, SeaVision

NOTE: If not sure of the correct size, simply measure the edge of the opening of the regulator, rebreather, or snorkel (not including the outer lip), as in the diagram below, top to bottom and side to side, and compare to the above measurements.