SL0+ Letterbox

244 x 127 x 22 mm

NEW SL0+ is large letter friendly packaging designed for confirmed online deliveries every time. Strong doormat friendly design. Perfect for health & beauty, cosmetics, jewellery, gifts, gadgets and small electrical items.

For assembly instructions - please click here.

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Product Description

This narrow, slim mailbox is the nearest to a guaranteed delivery letterbox-ready packaging option that we have.  With its narrow width and excellent length, we are very confident that there will be very few letterboxes that this product does NOT fit through; the entire range fits through around 90% of letterboxes in the UK according to our research.  This means that you can benefit from far fewer failed deliveries and even greater numbers of happy customers!  This option is a cost-effective Large Letter tariff compliant choice.  This large letter friendly packaging also features our market-leading hot melt peel 'n' seal / red-tear-strip combination, thick and strong cardboard material and 100% green recyclable credentials.  Beware of pale imitations and cheap, 'clipfast-tray' style packaging boxes.  Remember, if you're looking for the nearest thing to a guaranteed delivery every single time when using box packaging, this is the choice for you.

Confirmed deliveries every time without the need for recipients to be present.

This guaranteed delivery packaging range fits through most standard size UK letterboxes.  The strong design of this large letter friendly packaging is doormat friendly.  Hinged lid for extra wow factor, with secure seal.  Hot melt adhesive gives the best tight seal; it is at least twice the strength of standard double-sided tape.  Environmentally friendly, 100% recyclable. Problems with storage? At Lil packaging, we hold vast quantities of Lil letterboxes in stock for your convenience.


Your packaging is the first time that your customers physically experience your product. Getting it right is your chance to make the best first impression; we help you do just that.  With a clear understanding of what you need, we use our knowledge and expertise to guide you towards the most appropriate solutions.  It's about unrivalled service.  Over 98% of our orders are dispatched within 24 hours.  Getting valuable products safely to your customers without compromising on costs wasn't easy, until now.

Technical Specifications

  • Colour: Brown kraft
  • Height: 22 mm
  • Height inches: 0.9 inches
  • Length: 127 mm
  • Length inches: 5 inches
  • Material type: 125k e flute corrugated
  • Weight: 43g
  • Width: 244 mm
  • Width inches: 9.6 inches