The range of extender cards are extending promotional mailers. They almost triple in size when the tab is pulled providing plenty of room for your marketing message. See more here: http://bit.ly/1abHnQE Extender Card with mailing envelope Size: 209 x 100 x 5mm closed, extends to a length of 510mm. Printed envelope measures 210 x 103 x 6mm 4 colour process 350gsm silk art board Minimum order quantity 250 units Whitney Woods manufacture a range of pop-up and interactive promotional/marketing products. Our products are suitable for business to business direct mail, product promotion, event invitations/handouts, guerilla marketing campaigns and much much more. Based in the North West of England we produce our goods right here in Lancashire, supplying to customers in the UK and around the globe. Contact our sales team on +44 (0)1706 210538 http://www.popupmailers.co.uk / popupmailers / whitneywoodsltd Google+ http://bit.ly/19fWDbW