SW-826C Round Head Durable Dust Free Sponge Swab

Product Overview

The SW-826C is a round head durable sponge swab with a full spherical polyurethane foam tip bonded to a polypropylene handle, constructed for precision liquid application and small-area surface cleaning tasks where the round tip geometry provides uniform contact across convex or irregular substrate surfaces. Unlike pointed or rectangular foam tips, the round head makes full contact with curved surfaces, well interiors, tube openings, and contoured component housings from a single orientation — eliminating the repositioning steps required with flat-edged swabs in these geometries.

The foam head measures 10mm in length, 3.2mm in width, and 2.0mm in thickness, with the short 2.0mm thickness giving the tip a flatter, disc-like profile rather than a fully spherical shape. This geometry delivers precise spot-application capability suited to small-diameter targets: dropping controlled volumes of reagent onto a sample well, applying a spot of adhesive to a pin-point location, or delivering cleaning solvent to a recessed lens element without flooding adjacent optical surfaces. The foam material provides good liquid absorption and controlled release, maintaining a consistent liquid volume on the tip between contact points during sequential application tasks.

Durability & Material Characteristics

The high-strength polyurethane foam construction maintains its round profile under repeated compression against hard surfaces, resisting the deformation and flattening that lower-density foam tips exhibit after multiple use cycles. This dimensional stability is relevant in laboratory sample preparation workflows where consistent application geometry is required across multiple samples in a single batch. The foam material is soft enough to avoid surface abrasion on polished instrument lenses and coated slide substrates, and the lint-free structure leaves no fiber residue on cleaned or sample-loaded surfaces.

The polypropylene handle measures 70.3mm in total length with 2.2mm width and thickness — one of the most compact handles in this product series — providing finger-tip precision for close-range work at laboratory benches, inspection stations, and cosmetic application tasks. Package contains 100 pieces in small packs, 500 pieces in large packs.

Industry Applications & Use Scenarios

The SW-826C is used in laboratory sample preparation, pharmaceutical research, clinical diagnostics, optical instrument cleaning, precision electronics maintenance, and cosmetic formulation application. Specific use scenarios include applying reagent solutions to microplate wells, delivering spot treatments in dermatology and cosmetic skincare workflows, cleaning recessed optical lens elements, maintaining small-bore instrument contacts, and applying correction fluids or adhesives in precision assembly operations. The compact round head and short handle make it particularly suited to single-handed close-focus work where larger swabs create accessibility or accuracy issues.