Home / Door Hardware / Bi Fold Door Spare Parts Product Description Smarts Alitherm 1000 Bi-Fold mullion guide, available in 3 colours The Glide Hardware Mullion Top Guide for Passive Bi-fold Doors are used when you have an uneven number of bi-fold door panels, the mullion top guide sits in the nylon track at the top corner of a single hinged door panel and works with the mullion roller at the bottom to ensure effortlessly smooth fold and slide operation. Features: Suitable for door panels up to 100kg and 1200mm wide Main body manufactured from corrosion-resistant die-cast ZP5 Zinc alloy Mounted on austenitic stainless-steel spindles Available in anthracite grey RAL7016, black RAL9005 and HIPCA white Customer reviews No reviews left yet Write A Review Most RecentTop Rated Delivery & Returns Customer Reviews Smarts Alitherm 1000 Bi-Fold Mullion Guide Item in Stock (49 Available) Colour Hipca White Black RAL9005 Anthracite Grey RAL7016 RRP: £0.00 £13.50 £11.25 (ex. VAT) Login to add this product to your wishlist. You Will Earn 13 points which is the equivalent of £0.13