Lyman Sight Insert Set Series 20 and 93 Features The Lyman 20 Series Globe Front Sight features a larger 7/8 diameter tube and offers the shooter a brighter and larger field of view. Includes two post and five aperture inserts. Accepts Anschutz style inserts. Blued steel. 3/8 dovetail. Height is from bottom of dovetail to center of aperture. For 20 MJT-LJT 93 MATCH includes Anschutz size inserts. Two post inserts .067 - .102 wide. Five aperture inserts .126 - .133 - .154 - .161 - .169 - .177. Lyman Sight Insert Set Series 20 and 93 Specifications Two post-type inserts (.067 and .102 wide) Six steel aperture inserts (.126 .133 .154 .161 .169 .177 hole size)