Comparison : Item # YA5739-1, Red Annodized Gasketed Window Sight with “Add” and “Full” Markings, 15/16” Hex, 1/2" NPT
Item # YA7192-1, Press-Fit Fused Window Sight, 1 3/8” Dia
Item # YA5071-1, Anodized Aluminum Windowsight with Silk Screen Level Markings, EPDM Seal, 1 1/4" Hex, 1 1/16-12 UNF Thread
Item # YB3490-1, Brass Gasketed Window Sight, With Reflector, Glass Sight with Polycarbonate Shield, 2.835” dia, 2”-11 BSP Parallel Thread
Item # YB4100-17, 304 Stainless Steel Gasketed Window Sight, With Reflector, 2” Hex, 1 1/2” NPT