Exel Mophead PY Yarn Yellow 200G The Exel Mophead PY Yarn Yellow 200 g is a colour-coded, 200 g socket mop head made with absorbent PY (polyester) yarn and a push-fit Exel socket. Designed primarily for everyday cleaning of smooth hard floors such as vinyl, lino, laminate and similar surfaces, this mop head is widely used in commercial, industrial and domestic settings. Its yellow colour supports hygiene programmes by helping prevent cross-contamination between cleaning zones.