Westbury square bottom pin top balusters have a 1-3/4" square base and a 3/4" pin top dia. 32" Balusters are used on knee wall (or closed stringer) applications. > 35" & 39" Balusters are used on open stringer applications. Turning profiles follow the railing (rake rail alignment). 42" Balusters are used for volutes and turnouts. Wood balusters are sold unfinished and manufactured by Kinzel Wood Products. Proudly Made in USA. Please contact us about custom sizes 1-866-683-2025.