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Protective phone cases engineered for measured impacts

OnlyCases supplies dual-layer impact shells, slim polycarbonate frames, and liquid silicone cases to businesses, service centers, and individuals across Chicago and nationwide.

20–40 USD each

Unit quotes depend on exact phone model, base polymer, MagSafe array integration, and surface finish. Lead times: same-day turnaround or 1 to 3 business days.

Direct Physical Catalog Offers

Polycarbonate frames resist diagonal torsion under pressure, while 85A TPU perimeters absorb edge impacts at both room and sub-zero temperatures. Every case listed below is engineered to physical phone schematics, holding cutouts within 0.05 mm of device microphone ports and speaker holes.

Price Range 20–40 USD
Drop Ratings 1.2m – 3.2m
Lead Time Same-Day / 1–3d
Desk City Chicago, IL

Four core structural case architectures

Each architecture serves a specific mechanical purpose: extreme corner dissipation, minimal pocket profile, tactile grip with velvet interior, or transparent optical MagSafe charging.

Verified Mechanical Formulations
ArmorPro dual-layer TPU and polycarbonate heavy-duty phone case

ArmorPro Dual-Layer TPU & Polycarbonate Impact Shell

Designed for high-drop environments. Features an internal shock-dispersal lattice of 85A TPU vulcanized directly into an impact-resistant Bayer polycarbonate backing. Raised 1.4 mm display lip prevents glass contact during face-down drops. Independent anodised aluminium side buttons preserve tactile mechanical switch response.

Drop Impact Standard 3.2 meters onto industrial concrete
Bezel Clearance 1.4 mm front screen / 2.6 mm rear camera ring
Catalog Price Basis 20–40 USD each (typ. $34 USD)
UltraSlim lightweight matte polycarbonate protective phone shell

UltraSlim 0.8 mm Matte Polycarbonate Shell

For users requiring scratch defense and pocket ease without bulk. Molded from rigid 0.8 mm optical polycarbonate treated with an anti-slip oleophobic matte micro-etching. Zero interference with Qi inductive wireless coils and vehicle magnetic mounts. Weighs under 18 grams on standard phone footprints.

Shell Thickness 0.8 mm calibrated perimeter
Surface Finish Oleophobic soft matte (repels sebum oils)
Catalog Price Basis 20–40 USD each (typ. $22 USD)
Liquid silicone phone case with soft inner microfiber fabric lining

Liquid Silicone Soft-Touch Shell with Microfiber Lining

Formulated from food-grade liquid silicone rubber that resists UV yellowing, dust attraction, and tearing. The interior features a soft-touch microfiber fleece layer that traps trapped micro-particles, protecting high-gloss glass rear backplates from contact friction scratches.

Polymer Core 3-tier: Liquid Silicone + PC skeleton + Microfiber
Grip Durometer Shore 50A soft resilience
Catalog Price Basis 20–40 USD each (typ. $26 USD)
Transparent polycarbonate MagSafe case with embedded neodymium magnet array

MagSafe Clear Optical PC Case

Optical transparency combined with an embedded circular array of 36 high-flux N52 neodymium magnets. Built with an anti-yellowing additive package tested under accelerated xenon arc UV illumination. Backplate maintains flat contact with 15W inductive charging pucks without thermal degradation.

Magnetic Array 36 N52 NdFeB magnets, 54 mm concentric pitch
Optical Transmission 93.5% clear transmission rate
Catalog Price Basis 20–40 USD each (typ. $38 USD)

Materials and dimensional verification

We do not sell mystery plastics. Every case specification sheet lists the polymer formulation and the exact tooling tolerance.

Alina Koval • Procurement Manager
Active in Chicago since 2022
Raw optical TPU polymer pellets for protective case injection moulding

Thermoplastic Compounding

Virgin 85A Shore durometer TPU pellets deliver high elasticity during corner shock absorption while remaining rigid enough along side rails to prevent accidental phone pop-out during torsional flex.

Digital micrometer caliper inspecting protective raised bezel lip thickness

Micrometer Tolerance Inspection

Every batch received at 400 South LaSalle Street is sampled with digital calipers. We measure USB-C port clearance, microphone hole alignment, and camera plateau ridge protrusion down to 0.05 mm.

Step 01

Phone Model & Clearance Verification

We confirm the precise model variant, speaker grille spacing, and camera bump height to ensure proper bezel depth.

Step 02

Polymer Audit & Magnetic Strength Check

Cases undergo shore hardness checks, snap-fit retention tests, and Gauss meter readings for MagSafe magnetic arrays.

Step 03

Packaging & Direct Chicago Dispatch

Stocked units dispatch same-day; batch commercial inquiries ship within 1 to 3 business days with full commercial invoices.

Direct answers on case procurement

We provide clear boundaries on pricing, order verification, and model tooling compatibility.

Our unit basis is strictly $20–$40 each. The final figure depends on the phone model (standard vs large Pro Max or Ultra sizes), the structural material (single polycarbonate shell vs dual-layer TPU with metal buttons), whether an integrated 36-magnet N52 MagSafe array is included, and batch quantity.
No. OnlyCases operates an inquiry-only physical catalog. We verify model compatibility, tooling tolerances, and warehouse batch availability before issuing a formal quotation and invoice. No cart or checkout is hosted on this site.
This catalog is not for unverified generic bargain cases or thin paper-like promotional shells. We only stock cases manufactured from verified TPU, polycarbonate, and liquid silicone rubber with tested drop absorption and precise tooling tolerances.

Request protective case specifications

Submit your device model, required protection level, and estimated quantity for same-day or 1–3 business day Chicago turnaround.

OnlyCases Chicago Desk
+1 (340) 808-3456
office@onlycases.click

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