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When shopping for universal windows, replacement parts, or installation accessories, there's no need to consider your vehicle's year, make, or model.

One Window Size Doesn’t Fit All — But One Universal Series Does.

One Window Size Doesn’t Fit All — But One Universal Series Does.

Published by VWD on Nov 4th 2025

Amp Up Your Build with the VWD Overlander Series Half-Slider Bunk Windows ??

Whether you're outfitting a full-tilt conversion or building stock for resale, these four universal bunk windows are a game-changer. Here’s why.


Why Universal Bunk Windows Win Big

Let’s talk builders & resellers first:

  • No left- vs right-hand inventory hassles. Each of these windows is universal fit — install on either side of your van. No separate SKUs for driver vs passenger, no confusion.

  • Streamlined inventory = lower cost, higher margin. Fewer SKUs means less carrying cost, fewer errors, less wasted stock. More profit.

  • Fits a wide range of builds. As conversions vary, universal-fit bunk windows mean you don’t have to guess “will this fit that van?” They cover many sizes and layouts.

  • Appeals to DIYers and pros alike. Universal, high-performance, easy installation. That’s a strong sell.

  • Brand strength. VWD (Van Windows Direct) is known for van-conversion specialist windows. These bunk windows strengthen your product mix.


The Four Windows & Why Each One Fits

Here’s a breakdown of the four SKUs, so you can highlight versatility and inventory strategy.

1. OVR3009 (≈ 31-⅓" × 10-⅛")

OVR3009 Image

  • Outer dimensions ~ 31-5/16″ × 10-3/16″.

  • Compact size — perfect for smaller vans or tighter wall space.

  • Universal design, inclusive of clamp-ring install, bug screen, solar privacy glass with ~17% UV rating.

  • For your inventory: this size hits smaller bunk areas, tighter conversions, or “budget build” entry price point.

2. OVR3310 (≈ 35-5/16″ × 11-3/16″)

OVR3310 Image

  • Outer dims ~ 35-5/16″ × 11-3/16″.

  • Medium size — hits a broad sweet spot for many van lengths, bunk layouts.

  • Same universal fit, black aluminum frame, solar privacy, clamp ring install.

  • Inventory wise: great “standard” size offering — one SKU covers many builds.

3. OVR3511 (≈ 36-¾″ × 13-1/8″)

OVR3511 Image

  • Outer dims ~ 36-¾″ × 13-1/8″.

  • Larger footprint — for when you want more “view” or bigger opening while still retaining bunk-style.

  • Same performance features: half-slider, bug screen, solar-privacy glass, clamp ring and drainage system.

  • Inventory wise: this gives you an upsell size when budget or space allows.

4. OVR4015 (≈ 41-5/16″ × 16-5/16″)

OVR4015 Image

  • Outer dims ~ 41-5/16″ × 16-5/16″.

  • Big. When you want maximum size, natural light, expansive view but still in the bunk window category.

  • Universal fit so you don’t need separate left/right — you just pick size.

  • Inventory wise: the premium size offering. Great for high-end builds or larger van shells.


Combined Benefits – Build Story You Can Sell

When you roll these out, here’s the messaging that resonates:

  • Flexibility for any van model: Because they’re universal fit, you can stock one size and drop it into many van builds (fits many makes/models) — fewer SKUs, less confusion.

  • Simplified logistics + fewer errors: No left/right variants means less risk of shipping wrong side window, less returns, fewer headaches.

  • Cost efficiency: One universal SKU per size means fewer prints, fewer SKUs, better economies of scale — which you can pass on or retain as margin.

  • Customer satisfaction: Easy install, modern look, built-for-van lifestyle. That leads to referrals, repeat business.

  • Design credibility: The Overlander Series emphasizes ventilation, privacy, sleek black aluminum frame, solar-privacy glass and bug screen — key features builders and customers want.

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