Letter a. (89mm). Large size letter range in Grade 316 Stainless Steel ensuring longevity and easy maintenance. Bold typeface will provide clarity at a distance. Finish options BSS or SSS. Letter options a, b, c. (89-119mm) . Concealed 10mm offset pin fixing for easy and secure fitting. Suitable for Timber and Masonry fixing. Fitting template supplied. Matching numerals also available.