The mixer tap spool is suitable for most single lever taps, for bathroom mixer tap kitchen mixer tap .for switching the water temperature between hot and cold. Non-toxic and environmentally friendly silicone, mirror ceramic seal, no dripping, special slow opening design, will not cause tube vibration. The hard ABS plastic housing is stable and reduces frictional wear and tear to a minimum. Parameters:Opening angle - 23°, noise level - 2240-27.00db, diameter - 40mm, material - ceramic grinding disc. Package included: 2 x Ceramic tap cartridge.