HY-KO Letterbox Letter O 25mm Black Reflective SKU: 295883 MODEL: RV-15/O Error. try again later You've successfully joined the club $ 2 .49 each Available on orders $50 to $1500.More info × Mitre 10 MAvailable at Mitre 10 MEGA stores. Variants The Hy-ko range offers a wide range of letters, numbers and signs to suit your needs. They are easy to read and assist to increase attention and awareness. Features and benefits Self-adhesive. Easy to apply to letterbox, front door or any smooth clean surface. Great for outdoor use. Reflects light for enhanced visibility at night.