what are the dimensions? This seems to be a bit large

There are (2) dimensions. Inner seal is a 3 inch diameter seal, which sits inside the basket. The second dimension is the overall "lip" which seals the inner seal of the basket; 3 1/4 inch diameter.

why can this plug not be shipped to a California address?

I ship to California addresses. I live in California

Does this stopper fit down into the drain, or at the top of the drain so that it sticks out into the basin of the sink?

Inner flange diameter - 3 1/8". Outer diameter - barely greater than 3 1/4" (not a full 3 5/16"). It sticks up into the basin of my sink, and barely provides a seal so that the most minor bump to it results in a leak. The inner flange rests within the drain, but the out flange keeps it from resting down inside the drain.

Is this easier to pull out than the plastic stopper?

I have no problem pulling out the InSinkErator STP-SS what-so-ever. If you are having a problem breaking the suction, you can simply open drain function with this stopper.

Insinkerator STP-MTBLK Sink Stopper, Matte Black

Product ID: 496907371

Details

Brand
InSinkErator
Colour
matte black
Global Trade Identification Number
Material
Plastic
UPC
050375009528

🖤Matte black finish for sleek style

♻️Durable stainless steel core

🛠️3.25-in x 1-in stopper size

Description

🖤 Stop the drip, start the style — your kitchen’s sleek new MVP!

BUILT TO LAST - Crafted with durable stainless steel to withstand daily kitchen wear and keep drains clog-free.
MATTE BLACK MAGIC - Elevate your kitchen’s aesthetic with a trendy matte black finish that complements modern fixtures.
STYLE MEETS FUNCTION - Stops water and food particles effectively while adding a sophisticated touch to your sink area.
SEAMLESS FIT ZERO HASSLE - Designed to perfectly fit any InSinkErator disposal for effortless installation and removal.
COORDINATED KITCHEN UPGRADE - Available in multiple finishes with matching disposal flanges and air switches for a cohesive look.

The InSinkErator STP-MTBLK Sink Stopper is a 3.25-inch by 1-inch kitchen sink drain cover featuring a durable stainless steel core and a matte black finish. Compatible with all InSinkErator garbage disposals, it effectively blocks water and food particles while enhancing your kitchen’s modern aesthetic. Easy to insert and remove, it’s designed for longevity and style coordination with matching accessories.

Specifications

ASIN	B002I631IW
Brand	InSinkErator
Colour	matte black
Customer Reviews	4.6 out of 5 stars 271 Reviews
Enclosure Material	Plastic
Global Trade Identification Number	00050375009528
Included Components	Sink Stopper
Item Type Name	Fits Standard Kitchen Drain Size of 3 1/2 Inch Diameter
Manufacturer	InSinkErator
Manufacturer Part Number	STP-MTBLK
Material	Plastic
Model number	STP-MTBLK, Matte Black
Number of Items	1
UPC	050375009528
Unit Count	1.0 Count

Reviews

J**E

Works perfectly!

20.01.2026

A**R

This is only because of the placement of this one ...

11.06.2017

W**X

Great item and fits perfect

12.06.2025

N**7

Works well!

15.05.2025

K**R

Best Stopper I Have Found!

28.02.2018

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