Uni-Ball Signo RT1 UMN155-05 Gel Ink Rollerball Pen 0.5mm Blue/Black Box of 10
Uni-Ball Signo RT1 UMN155-05 Gel Ink Rollerball Pen 0.5mm Blue/Black Box of 10
Uni-Ball Signo RT1 UMN155-05 Gel Ink Rollerball Pen 0.5mm Blue/Black Box of 10
Uni-Ball Signo RT1 UMN155-05 Gel Ink Rollerball Pen 0.5mm Blue/Black Box of 10
Uni-Ball Signo RT1 UMN155-05 Gel Ink Rollerball Pen 0.5mm Blue/Black Box of 10
Uni-Ball Signo RT1 UMN155-05 Gel Ink Rollerball Pen 0.5mm Blue/Black Box of 10
Uni-Ball Signo RT1 UMN155-05 Gel Ink Rollerball Pen 0.5mm Blue/Black Box of 10
Uni-Ball Signo RT1 UMN155-05 Gel Ink Rollerball Pen 0.5mm Blue/Black Box of 10
Uni-Ball Signo RT1 UMN155-05 Gel Ink Rollerball Pen 0.5mm Blue/Black Box of 10
Uni-Ball Signo RT1 UMN155-05 Gel Ink Rollerball Pen 0.5mm Blue/Black Box of 10
Uni-Ball Signo RT1 UMN155-05 Gel Ink Rollerball Pen 0.5mm Blue/Black Box of 10
Uni-Ball Signo RT1 UMN155-05 Gel Ink Rollerball Pen 0.5mm Blue/Black Box of 10
Uni-Ball Signo RT1 UMN155-05 Gel Ink Rollerball Pen 0.5mm Blue/Black Box of 10
Uni-Ball Signo RT1 UMN155-05 Gel Ink Rollerball Pen 0.5mm Blue/Black Box of 10
Uni-Ball Signo RT1 UMN155-05 Gel Ink Rollerball Pen 0.5mm Blue/Black Box of 10
Uniball

Uni-Ball Signo RT1 UMN155-05 Gel Ink Rollerball Pen 0.5mm Blue/Black Box of 10

$21.07
$21.07
RRP $23.87
Add items to a quote for bulk pricing, approvals, or purchase orders.

SKU: UMUMN155-05BB

UPC: 4902778142769

MPN: UMN155-05BB

Smooth, precise gel writing in a retractable fine-tip pen

The Uni-Ball Signo RT1 UMN-155 is a retractable fine gel ink pen delivering smooth Signo gel at a fine 0.5mm tip with a click mechanism, combining writing precision with the convenience of a cap-free pen design.

The RT1 is the everyday retractable fine gel in the Signo range, widely used in offices, schools, and universities for its smooth writing feel and practical click mechanism. Blue/black at 0.5mm is a sophisticated ink colour — darker than standard blue, warmer than pure black — and is a classic choice for professional correspondence and formal writing. Supplied in a box of 10.

  • Fine 0.5mm tip for precise, smooth gel writing
  • Retractable click mechanism - no cap to remove or lose
  • Smooth Signo gel ink - vivid, fast-drying, and comfortable to write with
  • Blue/black ink - a sophisticated choice between navy and black
  • Compatible with UMR-85 refills
  • Box of 10
  • Everyday professional note-taking and office writing
  • Signing documents and formal correspondence
  • Desk and office use where a retractable fine gel is preferred
  • Students and professionals using the Signo range daily
  • Any use where click convenience and fine gel precision both matter

Shipping is kept simple with flat rates for selected areas and free shipping where applicable. Large, bulky, rural or out-of-area orders may require additional freight, and our team will contact you if this applies. For a more specific estimate, simply add this product to a quote.

Specifications

Brand: Uni-Ball

MPN: UMN-155-05

SKU: UMUMN155-05BB

Pen Type: Retractable gel ink rollerball

Tip Size: 0.5mm (Fine)

Ink Colour: Blue/Black

Ink Type: Gel ink

Compatible Refill: UMR-85

Pack Quantity: Box of 10

EAN: 4902778150375

Always Here to Help

Based around the Gold Coast, our customer support team brings deep office supplies knowledge, with most members having more than 10 years of industry experience. We are more than customer service agents. We are experienced office supply experts ready to help. Contact us below.

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Shipping & Delivery

Delivery time depends on your location, the size of your order, and the shipping option selected at checkout. For in-stock items, standard metro delivery in QLD, NSW and VIC is usually 1 to 7 business days. South Australia, Tasmania, Western Australia and the Northern Territory are generally 3 to 12 business days. Express delivery for eligible parcels under 3kg is usually 1 to 4 business days in QLD, NSW, ACT and VIC. Delivery estimates apply to in-stock items only and may vary due to carrier conditions or delays.

If you need to make a change to your order, please contact our team as soon as possible. Once an order has been processed or dispatched, changes may no longer be possible. You can contact us through our Contact Us page for assistance.

Mega Office Supplies ships orders Australia wide and occasionally internationally. The best avenue would be to contact us so we can customise a specific quote for you. Please note that associated international duties, taxes and levies will be the responsibility of the customer.

Returns, Refunds & Replacements

Mega Office Supplies accepts change-of-mind returns for unopened and unused products within 14 days from the invoice date, provided the item is returned in its original packaging and in resalable condition. Original shipping costs are not refundable, return shipping is the customer’s responsibility, and a restocking fee may apply depending on the product type and supplier. Some items, including electronics, assembled or installed furniture, food, beverages, medicines, custom-made products, and certain bulk or special-order items, are not eligible for return unless required under Australian Consumer Law.

If your order arrives faulty, damaged, or incorrect, please contact Mega Office Supplies as soon as possible. Where required under Australian Consumer Law, a repair, replacement, or refund will be offered. In these cases, Mega Office Supplies will cover reasonable return shipping costs, and photographic evidence may be requested to help process the claim. Items should be reported within a reasonable timeframe after delivery.

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