Specs are about .520 ID, 33 coils of .128 wire. New R9's-.600"plus, Old R10's .725" plus (spacing) Production will vary from 33-34 coils. Check your guides as these springs are now tighter-fit old guides only.
This spring fits all Tarantula XL kits from 1997-2005
This spring and the E3650 are installed into many guns. Often airgunners will hear these are great for a gun and then complain they lost power. They replace a 44 coil mainspring etc. with these straight away like it should do the trick. That is exactly why we sell spacers at the bottom of this section.
