8mm Dynamic Sewn Prusik Loops. 5008XXPSTXX. From $7.00. BlueWater's Product Development Department has worked hard to provide a durable Pre-Sewn 8mm prusik for use in rescue systems. Since not all PMPs are equally sized, they have created 3 sizes of Short Prusiks to work with the Long Prusik. When pulled end-to-end between 10mm pins the single loop strength exceeds 5000 lbf. to meet the OSHA Standard. Heat Shrink protective sleeve over durable 277 polyester thread stitched with a programmable bartack machine. 16" in blue pattern only. 18" in blue or yellow pattern. 22" in yellow pattern only. Made in the U.S.A.