The 2011-O is standard 62mm diameter prism and weather proof sealed in prism polycarbonate canister. Replace prism for model 1010 and 2010, as well as other leading manufacturers with M20x2 mounting threads.
62mm standard prism in orange canister
Weather-proof sealed precise prism
Precision ground glass up to 5 arc seconds
M20 x 2 male mounting thread
Target and holder sold separately 03-2012M or 03-1012
![[1-200565] 03-2012M-O Single Prism Mount with Target](/web/image/product.product/2744/image_512/%5B1-200565%5D%2003-2012M-O%20Single%20Prism%20Mount%20with%20Target?unique=ddd3bed)