Interior Retention Unit

• All-in-one protective packaging solution, with no void fill requirement
• Can be used with any box that fits length and width guidelines
• Protection for products of various sizes

From: £0.89
In stock
* Request your bespoke size here or request a quote for a larger quantity here
Amount: 1 units
Free delivery over £100 *
Price per unit:
per unit
total: ex. VAT inc. VAT
  • Free delivery over £100 *
  • 30 Days Returns

* Please refer to our delivery policy page. For any queries please contact us.


The best packaging for fragile items: Prevent breakage with our interior retention unit. Its thin film holds products securely in place during shipment. Place the unit in any transit box that fits in length and width and ship your products worry-free.

Recommended for

  • Homeware and decor

  • Electronics and photography equipment

  • Jewellery and other accessories


  • Made from single wall cardboard and stretch film

  • Combines with any box that fits the retention unit’s length and width

  • Small and large versions available to fit your products perfectly

  • Those products are not designed to be used for heavy duty products unless stated otherwise, not to be used under high humidity or high temperatures conditions

  • All dimensions may vary by up to 3mm

  • Use CSP006 with out Secure Postal Box CSP005, and CSP008 with our Secure Postal Box CSP007 


All-in-one protective packaging solution

Fragile products like ceramics, glasses and electronic devices like cameras, need protective packaging that secures them inside the box and avoids movement and shocks.

Our retention unit, made from cardboard and stretch film, offers complete protection without the need for further protective packaging like bubble wrap or air pillows.

By using our retention unit, you help ensure that your fragile goods arrive safely.

Use it with any box

DS Smith, as a leading supplier of sustainable packaging solutions, aims to offer you the most cost-effective and accurate packaging solution for your e-commerce business. Thus we have created a flexible retention pack that fits your products perfectly.

Every e-commerce has different needs, and we want to make sure you find the right box for your products. Simply choose the appropriate box type that fits in length and width with one of our retention units, and combine them.

Protection for products in various sizes

Due to the elastic nature of our retention units, you can use them to pack small products such as jewellery, photo lenses or external hard drives, or larger products, like ceramic bowls, headphones or cameras.

The stretch film fits the form and size of your product perfectly and keeps it safely in place – no need to worry about void fill or bubble wrap. Your products will arrive securely, and you will save money on packaging material, transportation costs and warehouse space.


Are you interested in ordering larger quantities?

Please contact us via email at

Created by Heipifrom the Noun Project