Micro 4" Ultramount Riser System for the RCBS Rockchucker, RC1, RC2, Supreme & Pro2000 Presses Constructed from 3\16" steel the Ultramount is super solid Lifts your press up 4" above the work surface and gets the shellplate closer to eye level Standard Ultramount Top Plates cross over between the three different Ultramount heights: 9-5\8", 7-1\2" & 4" You can swap top plates if you choose Durable black powder coated finish Made in the USA