Rail stanchion "stand-off" (105 degree x 2 1/8") - fits 7/8" tubing on fits Classic Boston Whaler 15' and 17' boats and other boats with similar railing systems. Made from high quality mirror polished 316 Stainless steel. 

Note: 16/17' hulls between 1961-76 use (2) SA-1 stanchions and the remainder are SA-2 stanchions. 16/17' hulls 1977 and newer use all SA-2 stanchions.

Distance between screws: 1 1/4"

Dimensions: shown in last image