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Clear rectangular sheet protectors in a box of 50

Business Source

Business Source 37519 Sheet Protector 50 Box 3.1 mil 8.50 x 11

SKU CH-3QH2-3M3E9 MPN 37519

Top-loading, unpunched polypropylene sleeves protect letter-size pages and tabbed indexes without lifting print, 3.1 mil thick, 50 per box

  • TypeSheet Protectors
  • ColorClear
  • Finish/SurfacePolypropylene
  • Quantity50 / Box
  • Clear polypropylene won't lift print
  • Top-loading design fits letter inserts and tabbed indexes
  • 15 mil thickness resists tears and glare
  • Die-cut corners let pages turn freely in binders
  • 50 protectors per box for high-volume filing

Top-loading protectors for letter pages

These clear polypropylene protectors accept standard letter sheets measuring 8.50 by 11 inches. Each box contains 50 unpunched sleeves that load from the top, so inserts and tabbed index pages can be added before holes are punched through both layers. The sealed binding edges and die-cut corners keep pages aligned while allowing smooth turning inside any ring binder.

3.1 mil thickness handles daily filing

The 3.15 mil material resists tearing and creasing during repeated handling and hole punching. A non-glare, non-stick surface prevents print lift and reduces reflections under office lighting, keeping text legible over long storage periods. Seams stay intact even when the protectors are fully loaded and frequently flipped.

Unpunched design requires manual hole alignment

Because the sleeves arrive without pre-punched holes, users must align and punch them to match their specific binder ring spacing. This adds a preparation step but guarantees compatibility with any three-ring or multi-ring system. Buyers who need ready-to-file protectors with universal punched holes already in place should choose a pre-punched alternative.

Highlights

  • Clear polypropylene won't lift print
  • Top-loading design fits letter inserts and tabbed indexes
  • 15 mil thickness resists tears and glare
  • Die-cut corners let pages turn freely in binders
  • 50 protectors per box for high-volume filing

Specifications

TypeSheet Protectors
BrandBusiness Source
ColorClear
Finish/SurfacePolypropylene
Quantity50 / Box
Shipping weight0.91 kg
Package size305 × 254 × 15 mm

Questions about this item

Do these 3.1 mil polypropylene protectors generate any static or noise when flipping through a full 50-sheet binder all day?

The non-stick, non-glare polypropylene surface prevents print lift and allows pages to turn freely without static buildup or audible friction during frequent handling.

Since the protectors arrive unpunched, what binding system must I already own to punch and use them?

You need a standard three-ring binder and a compatible hole punch; the die-cut corners on the ring side align with typical ring spacing once you punch through both protector and document.

Will the 8.50 x 11 inch size and die-cut corners work smoothly in an older binder with tighter ring spacing or worn rings?

The letter-size dimensions and die-cut corners are designed for standard ring spacing, so they turn freely in most older binders as long as the rings open and close cleanly.

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