Watering caps (for polycarbonate bottles without screw-thread) are made of stainless steel 1.4301. These types are available:

– Watering caps with standard closure

1. TVS
2. TR 25 – tube length 25mm
3. TR 40 – tube length 40mm

– Watering caps with ball closure (for guinea pig and rabbits)

1. TK 40 – ball closure, tube length 40mm
2. TK 100 – ball closure, tube length 100mm
3. TGK 100 – ball closure, curved cap, tube length 100mm
4. TGK 140 – ball closure, curved cap, tube length 140mm

More info: Cages and Accessories