HW97-77 PG4-DELRIN Glide Tune-Kit 12flb/16j

TUNE APPLICATION:HW97 PG4 DELRIN GLIDE Tune-kit.12ft/lb. 16 Joles HW77 smaller compression tube seal size requirements-please go to bottom of Page* Performance with HW OEM seal:Under Legal limit.*Will perform close to legal limits comes with two Thick Cut washers for fine tuning. Spring can be cut to reduce power by tuner.Product Code: PG4D78012027+Hth CONTENTS of PG4 DELRIN GLIDE Tune Kit: PG4 DELRIN MAIN GUIDE+ 2 DELRIN INNER GUIDES+TOPHAT DELRIN GUIDE   High Yield valve wire power springLubrication 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 asse