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Description
Theoben / Weihrauch HW90 Gas Ram Charging Pump Kit – Slim JimSuitable for HE and non HE Rams. 1 BA, and Standard Schrader Valve threads. DO NOT USE A DIVE CYLINDER. CHRONO AFTER ADJUSTMENT Want to purchase the cutting edge FX Airguns Pocket Chronograph from our store? BUY HERE Some useful information from: AirgunBBS Forum Thread 245395 The HE models (HE will be stamped on top of the breech) run at 700 1000PSI, depending on barrel length, calibre and the condition of the gun. 800 850 is most common, but Id
Suitable for “HE” and non “HE” Rams. 1-BA, and Standard Schrader Valve threads.
DO NOT USE A DIVE CYLINDER. CHRONO AFTER ADJUSTMENT
Want to purchase the cutting edge FX Airguns Pocket Chronograph from our store? BUY HERE
Some useful information from: AirgunBBS Forum Thread 245395
- The “HE” models (HE will be stamped on top of the breech) run at 700-1000PSI, depending on barrel length, calibre and the condition of the gun. 800-850 is most common, but I’d suggest to start at 700PSI and work upwards. More than 1000PSI risks damage to the ram. If it takes that much to get 11+ftlb, then the gun needs new breech, piston and ram seals.
- The pre-HE models run with half or less of the “HE” pressure.
- What is “HE” and why does it need more pressure? “HE” = high efficiency.
- It needs more pressure because the later Theoben’s have a short stroke length of just over two inches, with a cylinder bore of just over an inch.
- The stroke of the piston on a 12 ft lbs Theoben gas ram is 2.6 inches “HE” or not. The diameter of the (dummy piston) or gas ram on the “HE” model is 1/3 of that of the earlier one and the pressure goes up from 300 psi non “HE” to 750 psi “HE”. To achieve FAC velocity the stroke is increased to 3.2 inches the eliminator has a stroke of 3.7 inches. All Theobens after TB 6000 are “HE”.
- If I go over the 12ft/lb limit I gently tap the valve with a pin punch about “PFFFFFFT” is enough. It takes a bit of practice to do without a “POP” and a cloud of oily air being evident.
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4.7 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 5
Colorful, Sturdy & Great Value
Color: Large Set of 4
Purchased for our two puppies when they were 2 months old and weighed about 14 pounds so theses balls were a little big for them to hold in their mouths but that didn't stop them from trying. While they did like these balls they much preferred softer soccer balls, the later of which did not hold up well at all. I had hoped they would play with these balls more when they were older but that hasn't happened 5 months later. I guess it's no fun if you can't tear the toy apart. Colors are very bright and they do enjoy chasing after them as long as I am the one rolling them across the room for them. Maybe when they progress to batting things with their paws they will start to do this for themselves.
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Reviewed in the United States on May 18, 2025
★★★★★ 5
My pup loves them
Color: Large Set of 4
Colors are bright and my dog loves the squeaky! Good size no worries of choking.
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Reviewed in the United States on September 10, 2025
★★★★★ 5
amazing
Color: Large Set of 4
good buy worked well
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Reviewed in the United States on April 13, 2026
★★★★★ 4
3.5, Not 3.0
Color: Medium Set of 6
These balls were almost exactly what I needed. I was replacing my boy’s favorite ball, which is the 3” squeaky, spikey ball that fits in the chuck it launcher. Unfortunately I saw the shiny object next to it and because there were SIX balls and a dollar less, I failed to see that these are 3.5” balls instead of 3”…. Great balls but no fitty in the slingy. Buyer beware. No chuck it no problem. Save a buck.
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Reviewed in the United States on March 9, 2026
★★★★★ 5
MY CHIHUAHUA LOVES THESE BALLS!!
Color: Samll Set of 8
My little chihuahua, BamBam, is addicted to balls, especially little balls that squeak! However, any balls that have material on them, BamBam will tear them apart, swallow the material and then get an upset tummy! These balls saved the day! BamBam LOVES them & she cannot tear them apart! They hold up so well! No matter how much BamBam plays with them, they keep squeaking away!
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Reviewed in the United States on July 15, 2025
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