2 x Second SkinProtection Hydrocolloid Plasters (6). QUANTIY & SIZE: 6 units of advanced hydrocolloid plasters 76 mm x 35 mm. We are already a well-established "bricks & mortar" pharmacy in Hull EXTRA-STRONG HOLD FOR 72+ HOURS: The plaster provides an extra-strong hold for at least 72 hours, ensuring uninterrupted wound healing.