3" Hub Adaptor with o' ring 3 3/4" Hole Size Part # 300

We offer shipping to the USA and Canada, with many items qualifying for free shipping. Shipping costs are calculated based on weight and size at checkout. Shipping estimates are provided during checkout, and many products ship fast from Elkhart, Indiana.

We currently ship to the United States and Canada only.

Items that are eligible for return can be sent back within 30 days of delivery for a refund, but will incur a 20% restocking fee due to the custom nature of many products we carry.

Please note that many items are not eligible for return—including RV holding tanks, roller shades, and other built-to-order or special order items.

All returns must be pre-approved. To check if your item qualifies for return and begin the process, please use the AI Parts Chat on our website.

Because many items are custom-built or special order, cancellations are not always possible. Regular, non-custom items may be canceled if they have not entered the shipping process yet. Use our AI Parts Chat for quick help.

Once your order ships, you'll receive an email with tracking information.

Yes, we specialize in OEM RV parts from trusted brands like Lippert, MORryde, and Spinweld. You're getting factory-direct quality parts, not generics.

Use our AI-powered Parts Chat on the website for fast, accurate guidance. You can also check the detailed specs listed on each product page.

We accept Visa, Mastercard, Discover, American Express, and other major credit cards. We do not currently accept PayPal.

We don't offer wholesale pricing, but we strive to offer the best possible pricing for everyone by working directly with manufacturers.

The fastest way to get help is through the AI Parts Chat in the bottom-right corner of the website. For order-related questions, you can email help@elkhartrvparts.com.