The Mirka 1355-150B Sponge 1-Sided P150 is a one-sided abrasive sanding sponge for hand sanding and surface preparation. This is a sanding sponge designed for controlled manual sanding on workpieces where you want a little give in the pad instead of a hard sanding block. Model Number: 1355-150B. If you need a straightforward abrasive pad for finish prep, edge work, or general hand sanding, this is the kind of consumable that earns its spot in the shop because it is simple, consistent, and easy to grab when power sanding is overkill.

The P150 grit matters because it sits in a useful range for surface prep and intermediate sanding. It is aggressive enough to refine a surface and remove minor imperfections, but still fine enough to help avoid the deep scratch pattern you would expect from coarser grits. For painters, finish carpenters, cabinet builders, and anyone doing prep by hand, that means less fighting the surface and less wasted motion between sanding steps.

The one-sided design keeps things uncomplicated. You get an abrasive face on one side and sponge backing behind it, which helps the pad conform better than a rigid sanding block on edges, corners, and slight curves. That is the real advantage of this product category: the sponge backing helps maintain contact on uneven surfaces, while still giving you enough control for detail work that needs a lighter touch.

Size also plays a big role here. At 4.5 inches by 5.5 inches with a thickness of 0.1875 inches, the sponge is large enough to cover surface area efficiently but still slim enough for controlled hand use. That makes it a practical choice for quick sanding passes, blend work, and touch-up prep where a bulky pad would get in the way.

This Mirka abrasive sponge is sold in a pack of 250, which makes it a better fit for professional use, production environments, and shops that go through sanding consumables regularly. If you are buying for a crew, a finishing department, or a workbench that sees steady throughput, the larger package quantity cuts down on reordering and keeps a consistent abrasive on hand.

Who should buy it? Anyone who needs repeatable hand-sanding results and prefers stocking abrasives in volume. The Mirka 1355-150B Sponge 1-Sided P150 makes the most sense for contractors, woodworkers, painters, maintenance teams, and fabrication shops that need a dependable sanding sponge for prep work rather than a specialty abrasive with extra complications.

Simple abrasive, smart bulk buy

The Mirka 1355-150B Sponge 1-Sided P150 is the kind of sanding sponge that makes sense when you need dependable hand-sanding consumables in real quantity, not just a couple pieces hanging around the bench.

• Who it's for: Pros, shop crews, and serious DIY users doing regular hand sanding, finish prep, or surface cleanup.
• Why it stands out: The P150 grit is a useful all-around prep grit, and the one-sided sponge format gives you better feel and flexibility than a rigid sanding block.
• Worth knowing: This is a bulk pack of 250, so it is best suited to users who go through abrasives consistently.

• What grit is this Mirka sanding sponge? It is P150 grit.
• Is this a one-sided or two-sided sponge? It is a one-sided sanding sponge.
• What size is the sponge? The listed dimensions are 4.5 inches x 5.5 inches x 0.1875 inches.
• How many sponges are in the package? The package quantity is 250.