OSIUB OSB-MB-01B Matte Black Single-Handle Waterfall Bathroom Faucet

Bathroom: The OSIUB OSB-MB-01B is a matte-black, deck-mounted single-handle faucet with a waterfall-style spout. Its listed dimensions and widespread installation detail may help assess sink fit, while the listing gives conflicting installation and hole-compatibility descriptions that buyers should resolve before purchase.

At a glance

Single center lever and waterfall-style spout, with a listed spout height of 5.7 inches and reach of 4 inches.
Listing claims the matte-black coating helps resist fingerprints, water spots and corrosion.
Manufacturer describes a ceramic cartridge and claims the faucet is lead-free and complies with NSF/ANSI 372.

Price

$29.99Save 70%

Reference price: ~~$99.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

The manufacturer contents list includes a drain, deck plate, installation hardware and instruction manual.
The one-handle design offers a single control point for hot and cold water.
Customer feedback reports appealing appearance and easy installation, including positive comments about use in half baths.

Technical specifications

21 specifications

Identity
Brand	OSIUB
Model	OSB-MB-01B

Design and materials
Color	Matte Black
Finish type	Painted
Material	Stainless Steel
Spout design	Waterfall
Style	Modern

Installation and dimensions
Mounting type	Deck Mount
Installation method	Widespread
Hole count	3 holes
Mounting hole diameter	1.41 inches
Dimensions (D x W x H)	6.5"D x 6.5"W x 7"H
Spout height	5.7 inches
Spout reach	4 inches
Weight	2.6 pounds

Operation and features
Number of handles	1
Handle type	Lever
Handle lever placement	Center
Flow rate	0.35 liters_per_second
Special features	Lead Free, Pop Up Drain, Water Saving System
Recommended uses	Bathroom, Kitchen, Laundry, Outdoor

What to know before buying

Listing details to confirm

The listing is inconsistent about fit: it specifies widespread installation and 3 holes, but also claims compatibility with 1-hole or 3-hole sinks. It mentions a 6.5-inch deck plate while separately describing a 6.5-inch-wide overall dimension. Verify the sink layout and plate dimensions for the selected listing before buying. The advertised 20% water saving, 65% noise reduction, 15-minute installation, NSF/ANSI 372 compliance and lifetime support are manufacturer claims, not independently confirmed here.

What’s in the box

Included

Bathroom faucet
Deck plate
Drain
Installation hardware
User manual

Who is it for?

A good fit for

Buyers looking for a matte-black, single-handle waterfall-style faucet for a bathroom or half bath.
People whose sink setup matches the listed deck-mounted widespread configuration and who want a drain and deck plate in the listed kit.

Less suited to

Buyers who need confirmed fit for a particular sink-hole spacing or a guaranteed 1-hole installation without clarifying the listing's conflicting fit details.

OSIUB OSB-MB-01B Matte Black Single-Handle Waterfall Bathroom Faucet · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.8 / 5 · 159 ratings

5 stars91%91%
4 stars1%1%
3 stars4%4%
2 stars4%4%
1 star0%0%

Customer feedback highlights the faucet's appearance and ease of installation, with reported positive functionality for half baths. That feedback may matter to buyers considering a straightforward vanity upgrade, but it does not resolve the listing's uncertainty about sink-hole compatibility. Aggregate ratings skew strongly toward five-star ratings, while a smaller share is in the middle rating categories, so the overall picture is favorable but not unanimous.

Positive themes

Customer feedback describes the appearance as appealing and installation as simple.

Frequently asked questions

Is this faucet for a one-hole or three-hole sink?

The listing specifies 3 holes and widespread installation, but also claims compatibility with 1-hole or 3-hole sinks. Confirm the selected configuration and deck-plate fit with the seller before purchase.

What is included?

The manufacturer’s included-components list names the faucet, deck plate, drain, installation hardware and instruction manual.

What are the listed spout dimensions?

The listing gives a spout height of 5.7 inches and a spout reach of 4 inches.

What does the manufacturer claim about materials and certification?

The manufacturer describes stainless steel construction, says the faucet is lead-free, and claims NSF/ANSI 372 compliance. These are listing claims, not independent verification.