went through 3 of the masterclass type ones, always split in the end, so got some which looked just the same off fleabay from china at a fraction of the cost thinking just replace them when they split or crack
only to find the lookelikey ones were just that and didn't even seal around the o ring plunger as the main tubes were distorted so they went in the bin
then came across this one.
http://www.amazon.co.uk/Mr-Grill-Stainless-Marinade-Injector/dp/B00EF45AHUall stainless no weak bits and still going strong, different build quality to the others i have had
wish i had bought this one first
Other half moaned on about me finding new hobbies ..found this site..now she's sorry!!