Sinclair Custom Type A Drop Tubes are clear acrylic so you can observe your powder charge as it drops. Each drop tube is fitted with and aluminum sleeve to insure a perfect fit in your powder measure or drop tube adapter. Our 6.5mm and up drop tubes are available in 1/4" inside diameter and 4 different lengths. The longer lengths are great when you are trying to get more powder in a high fill case, especially when using longer bullets.
Type A Drop Tubes will require an Adapter for use with Redding Powder measures (749-010-851) or RCBS and Hornady Powder Measures (749-002-916). Type A Drop tubes fill fit directly into Niel Jones Powder Measures.
Sinclair, Issue:5B, Page:084