We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Clear polyurethane hemispherical bumpers on a sheet, 96 pieces

3M

3M SJ5302 Self-Adhesive Bumper Clear Polyurethane PK96

SKU CH-2ENK-PDWZV MPN SJ5302

Clear polyurethane hemispherical bumpers protect surfaces from scratches and vibration on electronics and small appliances

  • MaterialPolyurethane
  • Clear polyurethane protects surfaces from scratches and dents
  • Self-adhesive backing bonds instantly without tools or hardware
  • Low 0.085 in profile keeps devices stable and unobtrusive
  • 96-piece pack supplies bumpers for multiple home or office items
  • Versatile hemispheres suit keyboards, speakers, scales and more

Clear polyurethane bumpers for everyday surfaces

These self-adhesive hemispheres measure 0.085 in high and 0.312 in wide. The clear material blends with most finishes on keyboards, speakers, scales and electronic cabinetry. Supplied in a pack of 80 pieces for multiple applications.

Polyurethane construction

The durable polymer resists abrasion and keeps its shape under repeated contact. Each bumper sticks firmly to clean, dry surfaces without fasteners or tools. The low 0.085 in profile prevents snagging on cables or drawer edges.

Limited to light-duty impact protection

The small footprint suits feet on calculators, telephones, lamps and foot pedals. Not intended for heavy machinery, structural mounting or high-shear loads. Surfaces must be free of oil and dust for reliable adhesion.

Highlights

  • Clear polyurethane protects surfaces from scratches and dents
  • Self-adhesive backing bonds instantly without tools or hardware
  • Low 0.085 in profile keeps devices stable and unobtrusive
  • 96-piece pack supplies bumpers for multiple home or office items
  • Versatile hemispheres suit keyboards, speakers, scales and more

Specifications

Brand3M
ModelSJ5302
MaterialPolyurethane

Questions about this item

What is the 0.312 in width of the SJ5302 bumper and how does it affect spacing?

The 0.312 in diameter sets the contact area, giving each bumper a stable footprint that prevents sliding on smooth surfaces.

How much clearance does the 0.085 in height add when mounted under a device?

Each hemisphere raises the device by 0.085 in, creating a small gap that protects surfaces from scratches and allows airflow.

How do you install these polyurethane bumpers so the adhesive bonds properly?

Clean the mounting surface with isopropyl alcohol, let it dry, then press each bumper firmly for several seconds; skipping the cleaning step causes premature peeling.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.