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:
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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.
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Streamlined inventory = lower cost, higher margin. Fewer SKUs means less carrying cost, fewer errors, less wasted stock. More profit.
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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.
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Appeals to DIYers and pros alike. Universal, high-performance, easy installation. That’s a strong sell.
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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")

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Outer dimensions ~ 31-5/16″ × 10-3/16″.
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Compact size — perfect for smaller vans or tighter wall space.
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Universal design, inclusive of clamp-ring install, bug screen, solar privacy glass with ~17% UV rating.
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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″)

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Outer dims ~ 35-5/16″ × 11-3/16″.
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Medium size — hits a broad sweet spot for many van lengths, bunk layouts.
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Same universal fit, black aluminum frame, solar privacy, clamp ring install.
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Inventory wise: great “standard” size offering — one SKU covers many builds.
3. OVR3511 (≈ 36-¾″ × 13-1/8″)

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Outer dims ~ 36-¾″ × 13-1/8″.
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Larger footprint — for when you want more “view” or bigger opening while still retaining bunk-style.
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Same performance features: half-slider, bug screen, solar-privacy glass, clamp ring and drainage system.
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Inventory wise: this gives you an upsell size when budget or space allows.
4. OVR4015 (≈ 41-5/16″ × 16-5/16″)

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Outer dims ~ 41-5/16″ × 16-5/16″.
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Big. When you want maximum size, natural light, expansive view but still in the bunk window category.
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Universal fit so you don’t need separate left/right — you just pick size.
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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:
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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.
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Simplified logistics + fewer errors: No left/right variants means less risk of shipping wrong side window, less returns, fewer headaches.
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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.
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Customer satisfaction: Easy install, modern look, built-for-van lifestyle. That leads to referrals, repeat business.
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Design credibility: The Overlander Series emphasizes ventilation, privacy, sleek black aluminum frame, solar-privacy glass and bug screen — key features builders and customers want.