Description Smart Level Professional tile levelling system. 2mm Clips (pack of 100). Require Wedges which can be purchased separately. Suitable for any tile size or format. For tile thickness between 8 mm – 15 mm. How to use: Pressing wedge until 2 tiles at a level, 24 hours later when adhesive is dry then just kick the top of the spacer or use a rubber hummer. * prices shown are excluding VAT.