Scubapro 4.5ft Surface Marker Buoy (210D Nylon, Orange)
By Scubapro | Part #: 40.312.001 | Double Inflation System | High-Vis Safety Orange
Signal boat traffic and mark your ascent position clearly with the professional-grade Scubapro 4.5ft Surface Marker Buoy (SMB). Constructed from ultra-durable 210D nylon with High Frequency (HF) welded seams, this high-visibility safety tube is engineered to withstand rough ocean conditions, rocky entries, and heavy cold-water diving use.
Featuring a versatile double inflation system, the buoy can be inflated at depth using an octopus second stage via the open bottom duck-bill valve or orally/via an inflator hose using the metal inflator valve. An integrated 42mm over-pressure relief valve (OPRV) with manual pull dump prevents over-expansion during rapid ascents while enabling effortless deflation topside.
Dual Inflation Capability & High Surface Visibility
Standing 4.5 feet (140 cm) tall when fully inflated, this SMB cuts through surface chop and swells to ensure dive boats and shore crew spot your location immediately. The lower end features a heavy-duty 40mm stainless steel D-ring and bungee storage loop, while a plastic top D-ring allows secure attachment of a chemical light or beacon during night dives.
Key Performance Features
- 4.5ft (140cm) High-Visibility Profile: Bright safety orange color provides maximum visual contrast against open ocean water and waves.
- Heavy-Duty 210D Nylon Fabric: HF-welded seams with protective edge taping resist punctures, tears, and abrasion.
- Double Inflation System: Inflate via regulator second stage through the bottom internal baffle or orally / LP hose via the metal inflator stem.
- Over-Pressure Relief Valve (OPRV): 42mm pull-dump valve automatically vents expanding gas during ascent and allows quick post-dive packing.
- 40mm Stainless Steel D-Ring: Heavy-duty bottom attachment point secures finger spools, reels, or weight line clips.
- Integrated Top Light Attachment: Durable plastic D-ring positioned at the top tip for securing strobe lights or glow sticks.
- Compact Roll-Up Design: Built-in bottom bungee loop holds the SMB tightly rolled for effortless storage in a BCD pocket or harness pouch.
Technical Specifications
| Brand / Part Number | Scubapro / 40.312.001 |
| Inflated Dimensions | 55 in x 7 in / 140 cm x 18 cm (4.5 ft length) |
| Material Construction | 210D Nylon with HF Welded Seams & Edge Taping |
| Inflation Method | Double System (Duck-Bill Bottom Baffle & Metal Oral/LP Valve) |
| Exhaust / Dump Valve | 42mm Over-Pressure Relief Valve (OPRV) with Manual Pull Cord |
| Hardware & Attachments | 40mm Stainless Steel Bottom D-Ring, Bungee Loop, Top Plastic D-Ring |
| Weight | 8 oz / 228 g |
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