Fits all POWERbreathe K-Series' models and uses the standard 22mm connection:

• POWERbreathe K1
• POWERbreathe K2
• POWERbreathe K3
• POWERbreathe K4
• POWERbreathe K5
• POWERbreathe KH1
• POWERbreathe KH2
• POWERbreathe KHP2

Material: Polypropylene's (PP)