Origin: Manufactured by Vortek, USA
Product Code: PG4D73511318Hth

Performance model HO High-Output full power
7ft/lbs up to 9.5ft/lbs
700fps(.17cal)/212 m/s CP7.35g
510fps(.22cal)/154m/s JSB14.35g
665fps(.22cal)/202 m/s HN-G9.56g
Test done with Vortek 25mm Vac-Seal installed.
Very smooth shooting, steel damping no jump!

CONTENTS of PG4 DELRIN GLIDE Tune Kit: 
PG4 DELRIN MAIN GUIDE+ 2 DELRIN INNER GUIDES+TOPHAT DELRIN GUIDE   
High Yield valve wire power spring
Lubrication for metal, plastic and seals 

Installation:
For Consideration when tuning power:

It is the owner's responsibility to ensure legality of their air gun power output. Vortek’s Location of testing is 578 Feet.Above.Sea.Level. (F.A.S.L) For every 1000ft above or below will be approximately .029 difference in velocity, thus foot pound (Ft/lb, Joules) of shooting energy.

1000 F.A.S.L. x .029 = 29fps approx.   Joules= .7475=ft/lb.

Easy, do-it-yourself with virtually no-pre-load force on assembly. 
Works with all HW trigger arrangements